Part 6, 1921] AECIDIACEAE 453 
occasionally closely and inconspicuously verrucose; pedicel colorless or light-yellow, once or 
twice length of spore, fragile. 
On SOLANACEAE: 
Cestrum aurantiacum Lindl., Guatemala. 
Cestrum laurifolium L’Hér., Porto Rico; St. John; Tortola. 
Cestrum macrophyllum Vent., Porto Rico. 
Cestrum pallidum Lam., Jamaica. 
TyPE Locality: Island of Juan Fernandez, Chile, on Cestrum Pargut. 
DISTRIBUTION: West Indies and Central America; also in South America. 
25. Pucciniola Tweediana (Speg.) Arthur. 
Aecidium Tweedianum Speg. Anal. Soc. Ci. Argent. 10:11. 1880. 
Aecidium Wittmackianum P. Henn. Bot. Jahrb. 17:17. 1893. 
Uromyces induratus Sydow & Holway; Sydow, Ann. Myc. 1:16. 1903. 
Uromycopsis indurata Arth. Résult. Sci. Congr. Bot. Vienne 345. 1906. 
O. Pycnia unknown. 
I. Aecia usually hypophyllous, loosely grouped or somewhat crowded upon light-colored 
spots 1-3 mm. across, sometimes causing a gall-like distention of the leaf, cupulate, 0.2-0.3 mm. 
in diameter, 0.1-0.2 mm. high; peridium whitish, the margin erose, not projecting much beyond 
the ruptured epidermis; peridial cells broadly rectangular or rhomboidal in radial section, 13- 
19 by 23-32 yu, the outer wall 5~7 y thick, striate, the inner wall 2.5-3 » thick, closely verrucose; 
aeciospores globoid or oblong, 13-17 by 16-21 yu; wall colorless, thin, 1 uw or less, very closely 
and inconspicuously verrucose. 
III. Telia amphigenous or caulicolous, scattered or crowded in circinating groups about the 
aecia, round, 0.1-0.5 mm. across, tardily naked, chocolate-brown; stroma dividing the sorus 
into a number of chambers, .chestnut-brown, 15-50 4 thick; teliospores fusiform-oblong or 
oblong, 13-16 by 29-34 yu, rounded or acute above, rounded or narrowed below; wall pale cinna- 
mon-brown, thin, 1-2 », thickened at apex, 5-7 4, smooth; pedicel colorless, once or twice 
length of spore. 
On ACANTHACEAE: 
Dicliptera sp., Michoacan. 
Type LocaLity: Boca del Riachuelo, Argentina, on Diclipiera Tweediana. 
DISTRIBUTION: Southern Mexico; also in South America and Africa. 
Exsiccatt: Barth. N. Am. Ured. 1492. 
33. *ALLODUS Arth. Résult. Sci. Congr. Bot. 
Vienne 345. 1906. 
Cycle of development includes pycnia, aecia and telia, usually with distinct alternating 
phases; autoecious. Pycnia and other sori subepidermal. 
Pycnia deep-seated, usually globoid or flask-shaped, with ostiolar filaments. 
Aecia erumpent, cupulate or cylindric, in some species of two sorts, primary and secondary; 
the primary aecia sometimes giving rise to secondary aecia unaccompanied by pycnia; the 
secondary aecia often followed by telia from the same mycelium. Peridium colorless, dehiscent 
by apical rupture, the margin more or less recurved. Aeciospores catenulate, globoid or 
ellipsoid; wall colorless or nearly so, verrucose. 
Telia erumpent or long covered by the epidermis, arising independently, or else around or 
from within the secondary aecia. Teliospores free, pedicelled, two-celled, rarely accompanied 
by a few urediniospores; wall usually colored, firm, smooth or verrucosely sculptured. 
Type species, Puccinia Podophylli Schw. (on Podophyllum peltatum). 
Aecia and telia inhabiting monocotyledonous hosts. 
Host belonging to family Poaceae. 1. A. graminella. 
Host belonging to family Calochortaceae. 2, A. Calochorii. 
Host belonging to family Alliaceae. . 
Teliospore-wall closely verrucose 2. A. Calochorti. 
Teliospore-wall very coarsely and sparsely verrucose. . 3. A. Carnegiana. 
Teliospore-wall with a few longitudinal rows of verrucose markings. 4, A. subangulata. 
Teliospore-wall smooth. 5. A. Dichelostemmae. 
Aecia and telia inhabiting dicotyledonous hosts. ; 
Host belonging to family Portulacaceae. 6. A. claytoniaia. 
Host belonging to family Ranunculaceae. = ; ; 
Teliospores 45-87 uw long, sometimes longitudinally ridged. 7. A. gigantispora. 
Teliospores 32-50 u long, not ridged. 8. A. opposita. 
* Allodus in collaboration with CLAYTON ROBERTS ORTON. 
