Arachniopsis 85 



trib. Loca umbrosa humida ad terram et ligna semipu- 

 trida juxta fluvios Negro et Uaupes, in Brasilia boreali; 

 rarius in Andibus Peruvianis sylvaticis. 



a. Folia unicrura. 

 1. Arachniopsis Pecten Spruce. 



Dioica minuta ceerulescens. Caulis cellulis 5-seriatis — sc. cortica- 

 libus 4", axialibus 1-seriatis — conflatus. i^oZm pectiuatim patula lon- 

 gisetacea, cellulis 4 vel 5 linearibus constantia. 



Hah. Ad fl. Negro et Uaupes cataractas in terra rupibusque Immidis 

 umbrosis. 



Obs. The cells of the stem are usually opposite {i.e. collateral); but towards the 

 top of the branches the cortical cells of the upper face sometimes become alternate. 

 The hairlike leaves — each of 4 or 5 cells that are three or four times as long as broad 

 — spring from the marginal junction of two consecutive cortical cells; and they stand, 

 on each side of the stem, two (very rarely three) cells apart. 



b. Folia bier lira. 

 2. Arachniopsis coactilis Spruce. 



Monoica pusilla e viridi grisea, in sicco albescens. Caiiles e cellulis 

 5-Yel 6-seriatis conflati. Folia dissita ; crura -6 — '75 "^^ longa, cellulis 

 6 — 10 subduplo longioribus quam latis constantia. Bractece intimse 

 foliis paulo longiores, interdum solum 2 — S-partitse. Perianthia 

 cylindracea, 4— 6-plo longiora quam lata, ore triplicata et longiciliata. 



Hab. ad fluvios Uaupes et Negro. 



Var. capillacea S. Foliorum crura tenuissima, cellulis baud numerosis 

 (6 — 8) sed praelongis, 3 — 6-plo longioribus quam latis, constantia. 

 — In monte Camjiana Andium Peruvise, ubi ad spelunc® parietes 

 tan quam aranete telarum instar dilatatur. 



Yax.filifolia S. Foliorum crura longissima f 1-5— 1.8 ^^) e cellulis 10 

 — ^14, duplo (raro triple j longioribus quam latis, conflata. Perianthia 

 prgelonga (2-3 x 0-4 ™'") tereti-fusiformia, ore angusto triplicata. 

 Bractem intimae perianthio perpaulo breviores. — Ad Panure fluvii 

 Uaupes banc formam insignem— forsan pro specie propria habendam 

 — legi. 



