292 THE JOURNAL OF BOTANY ia 
105. L. ferruginea, sp.n. (Fig. 20.) L. filis tenuissimis, in 
stratum luteo-ochraceum dense intricatis; vaginis initio tenuibus, 
hyalinis, demum crassioribus et ferrugineis ; “trichomatibus eru- 
c ae a nulla. eo s. fil, 1 ‘8-2: p3 e@rass. trich. 0°8-0°9 p. 
Dominica + need Valley, forming a yellow-brown ferruginous 
pie 
f the Annet are is a thick deposit of t yellow- -brown 
material The trichomes ue periiner narrow, = a bright blue 
green colour, and the cells are from fi s longer than 
the diameter. The latter Saakaiee alone at once distinguishes this 
species from L, ochracea (Kiitz.) Thur. 
106, Pxormipium persicinum (Reinke) Gom. Crass. trich. 1:8- 
2p. Barbados.—Near Bridgetown, on roots of mangroves in brackish 
swam xe 
. P. TenvE aa sea Barbados. —Near Bridgetown ; 
ves hig Graeme Hall Swa 
108. P. ph (Kiitz.) sm Crass. ich. 1°8-2 p. Do- 
minica.—Roseau 
109. P. LaminosuM (Ag.) vee Crass. trich. 1°3 p. Trinidad.— 
Roy. Botan. Gardens, St. Ann’ 
110. OscrnLaToRIA PRINCEPS ‘ea ch. Crass. trich. 31-40 yw. 
Barbados.— Graeme Hall Swamp. The specimens were very fine, 
agreeing more with North American than with Huropean ones in 
point of view of size. 
111. O. sanora Kiitz. Crass. trich. 10°5-11°5 pw. Barbados,— 
Bay Estate. 
112. me umosa Ag. Barbados.—Graeme Hall Swamp. 
113. Crouan. Crass. trich. 4°1-4°4 yp. Barbados.— 
Near Crrsemig on roots of mangroves in brackish swamp. A 
somewhat thinner form (trichomes only 8 » in thickness) was ob- 
Hal mp. 
served from Graeme 
114, O. Tenurs Ag, can trich, 8:9-4°3 p. Barbados.—‘ Por- 
ter’s Estate.” 
115. O. srevis Kitz. Barbados.—Near Bridgetown. 
116. O. sussrevis Schmidle, in Engler’s Botan. Jahrbich. Bd. 
xxx. 1902, p. 243, t. 4, f. 7. Crass. trich. 5°1-5°7 p. Barbados.— 
Bay Estate. 
This species was present in some quantity amongst O. sancta. 
It seems distino t from 0. brevis Kutz., by reason of “the extreme 
ortness of its cells and the blunt peers of the filaments. The 
transverse cell-walls are often bent, some being concave towards 
one extremity of the filament, and Share convex towards the same 
