454 PLAGIOCHILA. 
§ 1. SPINULOSZ. 
Species plerzeque statura aspectuque nostrati Pl. spinulose comparabiles, 
paucee pusillee, perpaucee subrobuste, colore e viridi rufescente vel rufo- 
badio. Folia in omnibus fere alterna, in perpaucis subopposita ; aut 
distiche patula aut (etiam in una et eadem specie) recurvo-secunda ; in 
plurimis sat elongata et subdimidiata, 2-4plo longiora quam lata, raro 
latiora ; basi ad speciem subcuneata nunquam recurvo-cristata ; margine 
pro more dentato-spinulosa, rarissime ciliata; cellule plerumque 
mediocres, in aliis speciebus oblong linearesve. oliola adhue solum 
in unica specie (Pl. bursata) observata. Perianthia in plerisque duplo— 
in paucis 3-4plo—longiora quam lata, rarius alata, ore spinosa raro 
ciliata. Andrecia in ramis media terminaliave; bracteis seepe plurijugis 
in aliis speciebus parvis 1-2-andris, in aliis majoribus ad 6-andris. 
Hab. In sytvis planitiei Amazonici et in Andium radicibus plereeque 
species ubique fere sat vulgares super truncos prostratos putrescentesque 
in latas plagas se extendunt, vel ad ramulos vivos muscis immixtze 
erescunt; alize multo rariores ad rupes et arborum truncos in Andium 
media regione sylvatica iInveniuntur. 
Obs. All the species of this section are liable to exchange their green 
for a reddish-brown hue, even when growing, and the latter pervades 
them when dried. The rufous perianth is an almost constant feature. 
A pure roseate colour I have not observed in any species. The fine 
Pl. bursatais notable for its metallic lustre, golden on the eastern, coppery 
on the western side of the Andes; as also for its narrow dicranoid leaves 
and their linear (almost hypnoid) cells, and for the many-leaved capituli- 
form involucres. 
A. Involucrate. Bractee Q 1-4 juge, perianthit basin amplectentes. 
1. Pl. bursata. Caules tenues longissimi innovando-elongati, vix aliter 
ramosi, F, nitida subdissita squarrosa, preelonga et angusta, scalpelli- 
formia, apice acuminato bifida vel 3-4-spina, cellulis linearibus. 
Br. 2-4-jugie ovatee confertee, toto margine subspinosee. Per. vix 
emersa clavato-campanulata turgida subplicata, ore compresso 
spinosa. 
. Pl. Tunguraquensis. Elata, iteratim innovata, plerumque monotropa. 
F. subimbricata, patula vel secunda, semiovata, apice subacuto 
3—5-dentata, cellulis inferioribus elongatis, superioribus magis eequi- 
lateris. Br. 3-jugee, rude subspinosze, foliis majores subconformes. 
Per. vix emersa, late campanulata, antice subalata, ore compresso 
spinosa. 
3. Pl. rutilans. Tenuis subinnovata, ceeterum vix ramosa. F. subimbri- 
cata semiovata, basi antica valide recurva longe decurrentia, margine 
postico supra medium apiceque rotundato longispinulosa.—Var, ? 
wquatorialis, Elongata, interdum ramulis microphyllis  efloriferis 
pinnulata. FF. apice 2-5-fida-spinosave, caeterum subintegerrima. 
Per. ore subrecte truncato spinosa. 
bo 
4. Pl. hypantra. Filiformis vage ramosa, interdum subpinnata. F, 
imbricata patula oblique oblonga, margine postico apicem versus 
apiceque 2-6-dentata; ramulina truncato-bidentata. 
5, Pl. Negrensis. Pusilla, iteratim innovanda, sepius dichotoma. F, 
dissita ligulato-oblonga, apice subtruncato argute 4-spinosa; c¢. 
mediocres. Br. adpresse circumcirca spinoso-dentatee. Per. sub- 
emersa, Gbovato-campanulata exalata, ore rotundato longiciliata. 
