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Subgenus XII.—Platy-Lejeunea, S.Published online: 01 Dec 2010.

To cite this article: (1884) Subgenus XII.—Platy-Lejeunea, S.,Transactions of the Botanical Society of Edinburgh, 15:1-4, 124-129, DOI:10.1080/03746608409468124

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124 PLATY-LEJEUNEA.

SUBGENUS XII. —PLAT Y-LEJEUNEA, S.Elata, arborum ramulis foliisque repens, dein pendula, saturate badia v.

rufo-badia. Caules 1-6-pollicares et longiores, serpentini flaccidiimequaliter pinnati, vel pinnatim divisi, apice stepe longe sim-plices.

Folia magna (1.3-2 . 6mm) parum (raro dense) imbricata, siccando fere im-mutata, horizontaliter patula, apice tamen margineque antic() supeincurva, postico plus minus recurvula, unde ex ovato-oblongo ligu-lata videntur, rotundata obtusave, rarius apiculata, integerrima,basi sinuato-complicata ; lobulus parvus turgidus swpe cucullatus ;cellulte majuscules mediocresve subpellucidw pariete incrassato.

Foliola foliis sat breviora, sepe autem latiora, obovato-orbiculata v.reniformia, rotundata retusulave integerrima. Haustoria e radicellisvalde numerosis fastigiatis—saTe ex parte colligatis—scopwformia.

Fl. dioici, raro monoici: ramo brevissimo, foliis minutis 1- (raro pauci-)jugis infra bracteas stipato, insidentes, innovatione brevi parvi-paucifolia semper suffulti. Bracteve minute, foliis 2-4-plo minores,obcordato-bilob ce, complicate, lobis exacte (v. fere) wquiniagnis;bracteola angusta, apice retusa v. tridentata, raro bifidula.

Perianthia ultra bracteas emersa, f. caulinis tamen semper sat breviora,oblonga obovatave, apice rotundata, retusa, obeordatave, rostellata,valde compressa, margine toto, v. saltem supero, inciso-timbriata-ciliatave, facie postica apicem versus valde huntiliter 1- 2- v. 3-carinulata, carinis spinoso-alatis inermibusve, interdunt papillispilisve sparsa, vel omnino nuda, antice subplana inermia raro sub-spinul osa.

Androecia v. terminalia, v. ramulo proprio constantia, leptostachya,polyphylla.

Hab. In arborum truncis ramulisque, imo in foliis vivis, persape aliishepatitis at niuscis irrepentes, sylvas planitiei et montium humiliorumdensas humidas diligentes.

Distr. Species 8 vel 10 adhuc cognitae mimes Americas tropicse incolas,earum unica (Pl. L. transversalis) etiam in Australia et ins. Hawaiiinventa est, nulla tamen Asiatica. 5 species a meipso lectue per sylvamAmazonicam at Andes inferiores (tam occidentales quam orientales)solum ad alt. 1200m usque, habitant.

A. Dioicce.

a. Folia rotundata.

1. P. L. subrotunda. F. confertissima late semicordato-ovata; lobulus 4-plo brevior bifidus, segment° inferiore majore cucullato, superiorerhombeo piano. Foliola magna late imbricata reniformia, fere duplolatiora quam longa, breviter decurrentia retusa, Coto margine recur-vulo, basin versus foveolata. Br. lobo antico subminore.

2. P. L. tceniopsis. F. parum imbricata preelonga semicordato-ovato-oblonga, margine antico incurvula, postico valide recurva; lobulus6-plo brevior cucullatus. Foliola subimbricata reniformia longedecurrentia apice retuso recurvula, medio unisulca. Br. lobo anticosubminore. Per. obovato-cuneata, margine supra medium inciso-ciliata, dorso obsolete bicarinata pauciciliataque.

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PLATY-LEJEUNEA. 125

b. Folia apiculata.

3. P. L. Hobsoniana. F. vix subimbricata ovato-ligulata, lobulo minuto.Foliola orbiculata longe decurrentia. Per. obeordato-elliptica, mar-gine fere toto alata longissimeque ciliata, postice subspinosa, enticefere inermia.

B. Monoicce.4. P. L. vincentina. F. imbricata ovato-oblonga abrupte apiculata raro

mutica. Foliola imbricata reniformia. Per. obovata margine supramedium ciliata, postice alte convexa medioque dense ciliata.

5. P. L. pogonoptera. F. subimbricata ovato-ligulata rotundata. Foliolaobovato-orbiculata contigua. Per. oblonga, postice magis distincte2-carinulata, margine carinisque alata denseque spinoso-ciliata.

1. PLATY-LEJEUNEA SUBROTUNDA, Hook.Jung. subrotunda, Hook. in Kunth. Syn. pl. iequin., v: i. p. 41.

G. L. et N. Syn. Hep. 312.

Hab. Ad fl. Negro cataractas, in truncis putridis, socia L. Sagraana.

F 1.3 x 1.05 ; lob •35 ; c z1 ,-; fa .7 x 1 .2; br. lob. sup. •65 x •38, inf. •8 x •5;br t" . 5 x .35mm.

Badia late dense implexo-cespitosa. Caules 1-2-pollicares, scope totalongitudine matrici arcte adhnrentes, vage subramosi, ramique scopevalde rarnulosi, ramulo perbrevi, paucifolio, y v. neutro, e folii ferecujusque axilla egrediente, eidemque subiequilongo.

Folia confertissime imbricata late oblique semicordato-ovata, apice validedecurvo rotundata, margine supero incurvulo appressa, infero leniterrecurvulo ante lobulum profunde sinuata; lobulus fere 4-plo breviorovalis subbifidus, segmento inferiore majoreque subrotundo apicecucullato, superiore parvo rhombeo subplano; cellulae parvulce pel-

ambitu opacn, rotundo-hexagonae, pariete incrassato.Foliola late imbricata foliis fere Eequimagna, sed fere duplo latiora plain

longa, a basi breviter cuneato-decurrente reniformia, apice lateretusa, margine toto recurvula cellulisque parvis uniseriatis subopacismarginata, basin versus facie interns foveolata, externa umbonata,et ex umbone radicellas fasciatas, apice parrun divergentes pro-ferentia.

Flores dioici: ramulis brevissimis insidentes quasi-laterales innovationeparva suflulti. Bractem foliis subduplo breviores, obcordato-bilobm,complicatae, lobis submqualibus, v. antico paulo minore, obovato-trapezoideis; bracteola minor oblonga apice bifida bidentatave.

Obs. The short ramuli are usually female, rarely neuter. In some stemsthey spring from nearly every leaf-axil, and each bears a flower, withonly 1 or 2 (rarely more) pairs of minute leaves beneath it. Adnate tothe outer bract, springs an innovation, at a very acute angle, bearing fewsmallish (but not minute) leaves. The bracts are complicate and soshortly bifid that they are best described as obcordate, with a deep sharpemargination. In the outer bract (which widely imbricates the inner) theupper (antical) lobe is very slightly the smaller, leaving a narrow rim ofthe lower lobe visible all around the free edge, when the two are pressed

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126 PLATY-LEJEUNEA.

together ; whereas in all other Lejeunem the upper lobe of the bract isalways larger than the lower. The inner bract is either quite symmetrical,having the two lobes exactly equal, or the upper lobe is smaller, as in theouter bract.

2. PLATY-LEJEUNEA TIENTOPSIS, Spruce.

Hab. In sylvis fl. Amazonum, prmcipue humilioribus, ramulis foliisquevivis adrepens snpeque longe pendula ; locis : Para, S. Gabriel etS. Carlos, Yurimaguas, fl. Bombonasa, etc.

F 2.6 x 1•5, 2 . 0 x 1 . 5; lob •4 x •3; e QT ; fa 1 . 5 x 1 . 8; br . 7 et •5 longte; per1.4 x

Elata rufo-badia, strato tenui late repens. Caules 6-pollicares et longioresdebiles, pinnatim ramosi, aliis rands brevissimis floriferis, aliis elon-gatis fere simplicibus snipe pendulis.

Folia parum imbricata subdivergentia, siccando vix mutata, maxima,sernicordato-ovato-oblonga, rotundata vel truncato-rotundata, basicaulem late transeuntia, margine antico apiceque incurvula, postico(basi apiceque exceptis) valide recurva, prope basin profunde sinuato-complicata; lobulus sub 6-plo brevior paraboloideus (axi earth paral-lela, plica transverse) cucullato-concavus muticus; cellulaa majusculesubmquilaterm, pellucidm, ambitu subopacm, pariete ad angulosmediaque latera incrassato, inferiores submajores.

Foliola subimbricata foliis subminora sed latiora, reniformia longe decur-rentia, apice retuso recurvuloque repanda, a basi fere ad apicemusque sulcato-canaliculata.

Flores dioici: ramulo brevissimo, cum perianthio folium caulinum vixmquilongo, terminales, innovatione minuta suffulti. Bractem foliis4-plo minores obcordato-bilobee, lobis complicatis subzequalibus, velpostico submin ore ligulatoque ; bracteola tenera angusta ligulato-cuneata apice truncato obtuse 3-dentata.

Perianthia parva obovato-cuneata rotundata retusave brevirostria valdecompressa, margine supra medium inciso-ciliata, aliis ciliis snipe prm-longis hamatis, facie postica convexulá carinis 2 valde approximatiscite in unam obtusam confluentibus, pauciciliatis, percursa. Calyptraperianthio a brevior obovata, infra medium 2 c. crassa, apice irregu-lariter rupta.

Andrwcia subjulacea ramulis micro-polyphyllis constantia, rarius ramiapicem solum tenentia. Bractem cynbiformi-concavaa ultra bilobm,lobis semiovatis (margine externo subrecto) antico rotundato, posticovix minore obtuso.

Obs. Folia, e margine infero recurvo, supero incurvo, tots fere longi-tudine cequilata videntur, sive ligulata et subfalcata. Cellulse foliorumsubplanm, bractearum c3' et distincte convexo-prominulse, perianthiitrigonis pulchre pellucidis.

Bractea interna major est quam externa, basique innovationi perbrevi,foliis parvis bijugis prmditze, adnata est.

Forsan eadem species erit ac L. granulata, Nees in Mart. Fl. Bras. I.,p. 352; Syn. Hep. 311; quum tamen nihil dixerunt cl. auctores defoliorum marginis postici recurvatione insigni, nec de perianthii ciliisposticis, ad illam referre non ausim. Florescentiam hujus sectionis subsilentio omnes auctores relinquunt.

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PLATY-LEJEUNEA. 127

3. PLATY-LEJEUNEA HOBSONIANA, LindeOb.

Syn. Hep. 313; Gottsche, Mex. Leverm. 181.Hab. Chimborazo, in sylvis ad 1200m alt., e ramulis foliisque pendula ;

etiam in Mexico et ins. S. Vincentii.F P9 x P3, lob •075, c 24 ; fr. 1 . 25 x P2 ; br •9 x '7; br/a '9 x '55 ; per

x 1 . 25mm.Elata flaccida olivacea badiave, primum repens dein pendula. Caules

4-6-pollicares, flexuosi, inaNualiter pinnati.Flora basi sola imbricata, superne dissita, subplana, divergentia, oblique

ovato-ligulata ex obtuso apiculata, margine postico infra mediumrecurvulo longiuscule decurrente basique ipsa minutissime lobulata;lobulus plus 20-plobrevior, margine plerumque incurvus; celluke pel-lucithe majuscule. Folia interdum basi antica anguste semicordata.

Foliola foliis paulo minora, imbricata, orbiculata, ob alas longe decurren-tes suhspathulata, repanda, apice rotundata vel subretusa, medio handprofunde canaliculata, caAerum fere planissima, vel margine leviterincurvo foliis appressa, basi ipsa hint longius sensimque decurrentia.

Flores dioici. Ramuli , cum suo perianthio, folium caulinum proxi-mum vix aequantes, basi foliis unijugis minutis ovalibus, foliolointerposito rotundo, stipati. Bractae foliis duplo bre viores--alterainnovationi minuta microphylla basi adnata—complicata paruminaiquilobu, lobis abrupte acutis, postico subminore; bracteola ligu-lato-oblonga, a medio recurva, apice breviter bifida, segmentis acutisobtusisve.

Perianthia foliis breviora obcordato-obovata-ellipticave valde compressarostellata, fere ab ipsa basi ala profunde ciliato-laciniata circumcincta,facie antica convexula lmvia nisi marginem versus spinulis paucisobsita, postica convexo-carinata medium versus spinis setisve plurimisarmata.—Cilia marginalia ad semimillimetrum longa, 12 vel etiam16 cellulas longa, basi 2 v. 3 cell. lata.

L. Hobsoniana typica (Syn. Hep. 1. c.) vix differt nisi foliolis marginerecurvulis et bracteola solum emarginata.

A L. Vincentina et L. pogonoptera certe diversa vikletur : cattle 4-ploelatiore; foliis vix imbricatis longioribus (lingulatis) longe decurrentibusplanis minutissime lobulatis; foliolis plaids orbiculatis decurrentibus;floribus dioicis ; bracteis majoribus acutilobis ; bracteola bifida ; peri-anthiis margine longissime laciniato-ciliatis.

Obs. The perianth is rather thickly and widely set with hair-like pro-cesses about the middle of the back, but smooth near the top and bottom,and there is a thin crest of cilia on each side of the medial group, on araised line (carinula) parallel to and near the margin.

4. PLATY-LEJEUNEA. VINCENTINA, GOttSChe.

Hab. Prope Guayaquil, in cortice Theobromatis Cacao prcipue rarius.Ex ins. S. Vincentii primum alata.

F 1'25 x P0; lob •3; c 2s ; f1 x .95; br (explan.) •6 x '45; bri" '55 x '3;per 1.1x 8nun.

Pusilla, prostrata rufo-fusca. Caules pollicares subramosi flaccidi.Folia ad 4 imbricata horizontalia, apice deflexa, cmterum plane, oblique

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128 PLATY-LEJEUNEA.

ovato-oblonga ex rotundato apice brevi-apiculata, raro mutica, basicomplicata, plica transversh; lobulus 4-plo brevior cucullato-inflatus—in situ fere globosus; cellulEe mediocres pachydermes pellucitheannulo opaco cinctEe.

Foliola plus dimidio breviora imbricata reniformia basi exciso-subde-currentia, alia apice retusula, fere plana v. recurvo-convexula,solum ad pilum radicelliferum externe gibba.

Flores monoici in ramo brevissimo terminales, innovatione pauci-folia suffulti. Bracteee foliis duplo breviores obovato-oblongm,obcordato-bilobEe, segmentis rotundatis, laxe complicate, carinatze,altera (interior) submajor, ad carinam papilloso-subalata ; bracteolaobovato-oblonga retusula. Ramulus fertilis infra florem supissimefolium unicum minutum inmqualiter bilobum gerit, foliolo adjectominuto nullove.

Perianthia f. caulinis subminora obovata subobcordata antice depresso-plana laevia, postice alte convexa (e carinis duabus, inferne dissitis,apice conniventibus, in unam Otani prEelatam coalitis), margine amedio saltem hamato-ciliata, ciliis 4-6 c. longis, postice ad convexi-tatem supra medium ciliis dense conspersa. Calyptra paulo minortenuis pyriformis.

Amenta a ramulis caule inferiore insidentibus, folio caulino paulolongioribus, constantia; bracten mediocres 6-7-jugte baud confert.

L. pogonoptera differre videtur foliis minus confertis longioribus con-stanter muticis; foliolis orbiculatis nee reniformibus ; periantbiis oblongismagis regulariter ciliatis; anne tamen specifice ?

5. PLATY-LEJEENEA POGONOPTERA, Spruce.

Hab. Prope Para*, in cortice cum aliis Lejeuneis; ad fl. Huallaga Peruviieorientalis, supra Neckeram undulatam repens.

F 1.35 x •95, lob '2- .3, cA ; ftm •7 x x'75 x'75; br .55 x •55; brim '5 x 1;per 1 .0 x . 9mm (ciliis exclusis).

Humilis, sat robusta, rufa, prostrata. Caules 11-pollicares parumramosi, apice scope masculi.

Folia ad a lat. imbricata, late patula et vel incurvula vel a basi adapicem usque leniter recurvula (exindeque subconcava a frontevisa), semicordato-ovato-ligulata repando-rotundata, basi recte corn-plicata; lobulus folio 4-6-plo brevior alte serniovatus inflatus, adsinum in folium quasi acuminato-transiens; cellulae majuscula3hexagonad plance pellucidee, ambitu opac, inferiores perpaulomaj ores.

Foliola duplo fere breviora, contigua, obovato-orbiculata subdecurrentia,margine toto recurva, raro radicellifera.

Flores monoici: in ramo brevissimo terminales, innovatione breviparvifolia suffulti. Bractea3 foliis triplo fere minores orbiculateecomplicate?; ab apice ad h bilobae, lobis aequalibus obtusis; bracteolaangusta obovato-cuneata retusa. Ramus , cum sno perianthio,folium caulinum vix aequat.

Perianthia bracteis duplo longiora, oblonga, apice rotundato retusulovebrevirostria, valde compressa, antice depressa laevia, postice gibbabicarinata, margine carinisque dense spinoso-ciliatis, ciliis 6-10-collulas longis, basi 1 -2 cell-latis patulo-adscendentibus hamatisve.

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PLATY-LEJEUNEA. 129

Calyptra perianthio vix minor, unlearn cellulam crassa, infra apicernbreviter transverse rupta.

Andrcecia spicata in caule rarnisque terminalia — persmpe ramulofcemineo suffulta—julacea circinata strictave; bractem 6-plurijugm,foliis duplo minores equitantes, inferne parum turgescentes, admedium bilobae, lobis subnqualibus, antico obtuso, lobulo perpaulominore acuto.

Obs. Carinm perianthii posticn in plants Paraensi humiliores sunt,interspatio hevi; in Huallagensi altiores, interspatio spinis squamulisvepaucis obsito.

SUBGENUS XIII.—ANOPLO-LEJEUNEA, S.

Habitu, ramificatione, foliorum foliolorumque forma, floribus 9 quasi-lateralibus brevi-innovatis, Platy-Lejeunece sat conformis; differt autemstatura humiliore, colore pallid o, bracteis submajoribus parvilobulatis, at(pm aliis) perianthiis turgidis, paulo compressis, supra medium altiuscule5-carinatis perfecte inermibus.

Hab. unica species ad fl. Negro, in cortice, supra alias Lejeuneas repens.

1. ANOPLO-LEJEUNEA HERPESTICA, Spruce.Hab. Ad fluminis Negro cataractas, in cortice.F 1.0 x '8, lob .4, c f'" x . 7 ; br . 9 ; bri" . 6 ; per 1.0x .6uun.Majuscula pallida prostrata. Caules fere bipollicares flexuosi pinnulati.Folia subimbricata late patula decurvula infra medium complicato-biloba,

"did, fere transverse, recta vel subconcava ; lobus oblongo-rotundas,basi antics semicordata cardem velans; lobulus plus duplo breviorsemiellipticus—fere semicircularis—cucullato-concavus, apice in lobimarginem sensim transiens ; cellular mediocres onanes fere conformesmquilaterm pellucida fere vacum, pariete incrassato.

Foliola dissita, fens fere mquilata, duplo tamen breviora, cuneato-reni-formia repanda tenuia fragilia, radicellas fasciculatas spice subpatentesgerentia.

Flores dioici: 9 in ramo brevi, foliis sub 3-jugis vestito, terminales,innovations brevi sirnplice—raro prolifera—suffulti. Bracteaa foliispaulo minores erecto-patulm oblique ovales apice cucullato obtusm,basi cum lobulo parvo oblongo complicate ; bracteola cuneata trun-cato-retusa (in floribus sterilibus sage latior apiceque subbifida).

Perianthia (vix matura) subemersa cuneato-pyriformia brevirostria corn-pressula, medio supero altiuscule 5-carinata, carinis repandis iner-mibus.

SUBGENUS XIV.—BRACHIO-LEJEUNEA, S.

Phragynicomce species Syn. Hep.Hanitu, statura, etc. Hornalo-Lejeunece persinailis. Florescentia typica

probabiliter eadem, sc. monoica (autoica et paroica), smpe autem ex abor-tione dioica.—Plantaa 9 eodem modo brachiato-dichotonam, steriles tamenelongates laxe pinnate, ramis alternis. Folia fere constanter integerrirna,

TRANS. BOT. SOC. EDIN. VOL. XV.

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