— 288 — 



b. Folia sterilia late-ovata. Pinnæ fere æquilongæ, 



subsessiles, crenatæ 1. L. Curupiræ (Lindm.) 



B. Folia in apice rhizomatis scandentis fasciculata. Maculæ 



2 — 3 sei'iatæ, plerumque appendiculatæ . . 8. L. BernoulUi (Kuhn). 



1. Leptochilus guianensis (Aublet) G. Chr. — Fig. 1. 



Syn. Polypodium Aublet, Hist. pi. Guian. 2:962. 1775. — Acro- 

 stichum scandens Raddi, Opusc. sei. Bologna 3:284. 1819; PI. Bras. 

 1:6 tab. 18. 1825. — A. Raddianum Kze. ; Hook. spec. 5:264. Hk. 

 Bak. Syn. 423. 



Lamina folii sterilis lanceolato-elongata, 3 — å'^^^ longa, pinnata, versus 

 apicem pinnatifida. Pinnæ numerosæ , 20 — 25 jugæ, sursum in apicem 

 laminæ pinnatifidam decrescentes, superiores ala angusta connectæ, ceteræ 

 sessiles vel inferiores breviter petiolatæ, distincte ad rachin articulatæ, 

 ovatoacuminatæ, 6 — 10<=™ longæ , IV2 — 2*^™ latæ, basi breviter cuneatæ, 

 virides, firmæ, subcoriaceæ, omnino nudæ. Margo manifeste serratus. 

 Gostulæ nullæ. Maculæ costales maximæ, triangulares, cetei'æ uniseriatæ, 

 exappendiculatæ. Venulæ exteriores liberæ apicibus vix incrassatis intra 

 marginem desinentes. — P»achis squamis paucis lineari-subulatis integris 

 præsertim ad basin pinnarum instructa. 



A w^ell-known species. As to some characters: the distinctly articu- 

 lated pinnæ, the pinnatifid apex of (he frond, the wide-scandent rhizome, 

 it is pecuhar in the group. The venation is principally the same as that 

 of L. serratifolius , and the absence of lateral veins („main veins", 

 costulæ), a character highly valued by Baker, is due only to the relative 

 narrowness of the pinnæ. A glance at the accompanying figures may 

 show it. The rachis is not — as stated in Syn. Fil. — quite glabrous, 

 but furnished with a few, hairlike scales, it is also commonly winged in 

 the upper part, not unfrequently in the upper half, and a young leaf, 

 leg. Spruce, has the rachis and stipe rather broadly winged to the ground. 

 This leaf thus much resembles a frond of the next species. — L. guia- 

 nensis varies as to the number and the length of its pinnæ — a plant, 

 leg. Miers, has them 1 1/2'^'^™ long by 1 Va*^™ broad — but otherwise it is 

 very constant. The species is common in southern Brazil, known also 

 from Guiana, and gathered in Puerto Rico by Sintenis. 



Specimens examined : 



Brasilia: sine loco: Sellow (HB); Riedel (HB); P.V.Lund (HH); 

 Burchell n. 3598 (HB). — Rio de Janeiro: Gaudichaud (HB) ; Miers (HB) ; 

 Schottmüller (HB); Glaziou n. 372 (HH) ; Mosen n. 2732 (HB, HH). — 

 St. Catharina: Gaudichaud (HB). — Bahia: Blanchet (HB). — Tanaii: 

 Spruce n. 15 (HB). 



