Part 8, 1922] AECIDIACEAE 587 
1. UROMYCES. 
Telia subepidermal, definite, erumpent or long covered by the epidermis, usually without 
paraphyses. ‘Teliospores free, pedicellate, one-celled; wall usually colored, firm, smooth or 
verrucose, the pore one and apical, or nearly so. 
Uredinia when present subepidermal, erumpent. Urediniospores echinulate, the pores 
more than one, and variously placed. 
Genus based upon a concept, and not upon a type species. 
Host belonging to family Caesalpiniaceae. 
Urediniospore-pores 3, equatorial. 
int 1. U. imperfectus. 
Urediniospore-pores 3-5, variable. 2. U. guatemalensis. 
Host belonging to family Krameriaceae. 3. U. Krameriae. 
Host belonging to family Fabaceae. 
Teliospores globoid. 4. U. Sabineae. 
Teliospores obovoid. ‘. 5. U. illotus. 
Host belonging to family Euphorbiaceae. 
Urediniospore-wall 1.5 yu thick, or less. 6. U. oaxacanus. 
Urediniospore-wall 1.5 4 thick, or more. 7. U. agnatus. 
Host belonging to family Acanthaceae. 8. U. Hariotanus. 
Host belonging to family Carduaceae. 
Teliospores globoid. 9. U. piauhyensis. 
Teliospores oblong. 10. U. oblongisporus. 
1. Uromyces imperfectus Arth. Bull. Torrey Club 47: 472. 1920. ; 
Uredo Bauhiniae Berk. & Curt. Proc. Am. Acad. 4: 126. 1860. 
Uromyces Bauhiniae Vesterg. Ark. Bot. 455: 21. 1905. Not U. Baukiniae P. Henn. 1895. 
II. Uredinia hypophyllous, scattered, round, 0.2-0.3 mm. in diameter, early naked, 
pulverulent, cinnamon-brown, ruptured epidermis inconspicuous; urediniospores broadly 
ellipsoid, 21-26 by 26-31 »; wall dark cinnamon-brown, 1.5—2.5 » thick, rather sparsely and 
strongly echinulate, the pores 3, equatorial. 
III. Telia hypophyllous, scattered, round, 0.2-0.3 mm. in diameter, early naked, pulver- 
ulent, chocolate-brown, ruptured epidermis inconspicuous; teliospores broadly ellipsoid, 18-21 
by 19-23 », rounded at both ends; wall dark chestnut-brown, 3 u thick, slightly thickened at 
apex, 4-4.5 yu, reticulate with meshes 1-1.5 « wide; pedicel colorless, fragile. 
On CAESALPINIACEAE: 
Bauhinia sp., Nicaragua; Jamaica. 
TYPE Locality: Nicaragua, on Bauhinia sp. 
DIsTRIBuTION: Nicaragua and Jamaica. 
ILLUSTRATION: Ark. Bot. 415: pl. 1, f. 4. 
2. Uromyces guatemalensis Vesterg. Ark. Bot. 4%: 20. 1905. 
II. Uredinia hypophyllous, scattered, round, minute, 0.1-0.2 mm. in diameter, early 
naked, pulverulent, cinnamon-brown, ruptured epidermis inconspicuous; urediniospores glo- 
boid or ellipsoid, 18-22 by 20-25 »; wall cinnamon-brown, 1.5-2 u thick, moderately and 
rather finely echinulate, the pores 4-5, sometimes 3, equatorial or somewhat scattered. 
III. Telia amphigenous, scattered, round, minute, 0.1-0.2 mm. in diameter, early naked, 
pulverulent, dark chocolate-brown, ruptured epidermis inconspicuous; teliospores globoid or 
ellipsoid, 19-22 by 23-27 u, rounded at both ends; wall chocolate-brown, rather thick, 2.5- 
3.5 py, thickened at apex, 5-7 uw, reticulate with meshes about 2 u across; pedicel fragile, 
colorless, about as long as spore. 
On CAESALPINIACEAE: : 
Bauhinia inermis Pers., Guatemala; Costa Rica, 
TYPE LOCALITY: Retalhuleu, Guatemala, on Bauhinia sp. 
DIsTRIBuTION: Central America. 
Intusrration: Ark. Bot. 4'5: gl. 1, f. 3. 
3. Uromyces Krameriae Long; Arth. Bull. Torrey Club 45: 
143. 1918. 
IlI. Telia amphigenous and caulicolous, scattered, oblong, 0.1-2 mm. long, soon opening 
by a longitudinal slit, loosely and prominently pulvinate, chestnut-brown, ruptured epidermis 
