354 FLORA OF SOUTH AMERICA. 



— Flowers blue. — British Guiana, Schomburgk, 1st Coll. n. 

 171; 2nd Coll. n. 119 (58). 



894. I. umbellata, Mey.— Chois. in DC. Prod. 9, p. 377- — 

 In dried specimens this species is often not distinguishable 

 from the Asiatic I. cymosa, for which I had mistaken it in 

 the Botany of the Voyage of the Sulphur ; but it appears 

 that it has always yellow flowers, not white as in I. cymosa, 

 and the leaves are usually, though not always, more deeply 

 cordate or sagittate at the base. 



895. I. evolvuloides, Moric. — Chois. in DC. Prod. 9, 

 p. 373. — Flowers blue.— British Guiana, Schomburgk, 2nd 

 Coll. n. 505 (797). 



There is also a slender variety, from Roraima, with much 

 longer petioles and long points to the leaves, perhaps a dis- 

 tinct species, but the specimen is insufficient. Both forms 

 come very near to the genus Jacquemontia. 



89b". Jacquemontia hirsuta, Chois. in DC. Prod. 9, p. 397- 

 — British Guiana, Schomburgk, 2nd Coll. n. 370 (654). 



897. Aniseia ensifolia /3 minor, Chois. in DC. Prod. 9, 

 430. — Flowers white. — Moist Savannahs, British Guiana, 

 Schomburgk, 1st Coll. n. 77G. 



898. Evolvulus strictus, sp. n., caule rigido elongato longe 

 sericeo-piloso, foliis dissitis anguste oblongo-lanceolatis utrin- 

 que molliter appresse pilosis, floribus in axillis superioribus 

 sessilibus supremis in spicam approximatis, sepalis lanceo- 

 lato-subulatis hirsutis corolla dimidio brevioribus capsula 

 duplo longioribus. — Dry savannahs, near Roraima, Schom- 

 burgk, 1st Coll. n. 1036. 



Caulis adest sesquipedalis, strictus, superne ramulis ali- 

 quot brevibus auctus. Pili caulis et foliorum paginee infe- 

 rioris candicantes, foliorum superiorum et inflorescentise fer- 

 ruginei. Folia inferiora pollice paullo longiora, 2-3 lin. lata, 

 acuta v. obtusiuscula, basi angustata. Folia floralia caulinis 

 minora sed consimilia, inferiora 5 lin. longa, suprema calyci- 

 bus subbreviora. Inflorescentia spicam format foliosam, 

 superne densam, basi interruptam, in specimine 5 pollicarem. 



