136 



longiore, ramis subsimplicibus, foliis semiovato-oblongis validius 

 spinoso-dentatis. 



Plagiochila (§ Froxdescentes) RUFOVIRIDIS, n. sp. 



Dioica, e viridi rufescens, caule sesquipollican pinnato, ramis 

 rarius ramulum proferentibus. Folia imbricata, distiche patentia, 

 semiovato-oblonga, basi subsemicordata caulem velantia vel 

 recurvula, margine antico recurvo decurrente inteeerrimo vel 



denticulis 1-3 distantibus armata, postico distanter spinoso- 

 dentata, apice subtruncato plerumque 4-dentata, dentibus omni- 

 bus 12-15 in^equilongis. Flores 9 in ramis terminales, Bracte^e 

 foliis subconformes, apprcssse, antice serrulatae, postice apiceque 

 crebrius longiusque spinoso- dentatae, Perianthia vix emersa, 

 cuneata, compresso-obconica, oblique subtruncata, hinc ala per- 

 angusta integra percursa, ore dentibus parvis, crebris, brevi- 

 subulatis armata.^ — Folia 2.5 X 1,35 cellular ^; perianthia 3.0X 

 1.8 



Tnra 



Hab. Yungas Bolivia, aliis Plagiochilis et Lejeuneis immixta. 

 (No. 3,050 p. p.) Stirps solitaria mihi adevat, ab affinibus omni- 

 bus sc. P. disti7icti folia, cet., diversa videbatur. 



P. DIVERSIFOLIA, L. ct G. — Yungas, alt. 6,000 ped. (No. 

 3,063, 3.050 p.p.) 



P. L^TEVIRENS, Lindenb. var. ? Mapiri, alt 5,000 ped. 

 (No. 3,077). 



P. DISTINCTIFOLIA, Lindenb, Yungas, alt. 4-6,000 ped. 

 (No. 3,049» 3,050 p.p.) ' 



P. XANTHOCHROMA, Spruce, Hep. Am. et And. Yungas, 

 alt 6,000 ped., fertilis. (No. 3,050 p. p.) As Dr. Rusby's speci- 

 mens, although v^ry few, possess good perianths, which were 

 wanting in those I took as the type of the species, I add a brief 

 description. As in the plant of Ecuador so in that of Bolivia, 

 the leaves rapidly discharge their yellow coloring matter on 

 being steeped in water, and remain quite bleached. 



Folia utroque margine late recurva, in sicco tarn revoluta ut 

 distantia et pectinata videntur; alia apice bifidula, segmentis sub- 

 spinuloso-denticulatis. Cellulae materie colorante in aqua cito 

 evacuatse scariosse restant. 



Flores 5 in ramis terminales. Bracteae subbijugae, basi peri- 

 anthium amplectentes, dein late patulae, foliis paulo majores, 

 margineque postico magis spinosae. Perianthia emersa, cuneata, 

 compressa, exalata, ore obliquo subrotundato-truncato crebre 



