486 J. C. ARTHUR 
169. Puccinia fuscata Arthur & Holway sp. nov. (on Lamiaceae). 
Cunila leucantha Benth., Quezaltenango, Jan. 18, 191 7, O, I, II, III, 
742; same, Jan. 28, 1917, O, I, II, III, ySj (type). 
Cunila polyantha Benth., Solola, 7000 feet alt., Jan. 31, 1915, O, I, 
II, iii, 166. 
Pycnia epiphyllous, crowded in small groups, subepidermal, in- 
conspicuous, globoid, 128-150 At in diameter. 
Aecia hypophyllous, in small groups of two to five opposite the 
pycnia, round, 0.1-0.4 mm. across; peridium wanting and replaced by 
a more or less definite layer of mycelium; aeciospores ellipsoid or 
globoid, 23-29 by 26-33 Mi wall colorless, 1.5 /x thick, closely and 
coarsely verrucose. 
Uredinia hypophyllous, scattered, roundish, 0.1-0.6 mm. across, 
early naked, pulverulent, golden-brown, ruptured epidermis rather 
inconspicuous; urediniospores broadly ellipsoid or obovoid, 23-26 by 
26-32 }x] wall cinnamon-brown, 1.5 m thick, moderately echinulate, the 
pores 2, equatorial. 
TeHa hypophyllous, scattered, round, 0.2-0.4 mm. across, early 
naked, pulvinate, light chestnut-brown, becoming cinereous by germi- 
nation, ruptured epidermis inconspicuous; teliospores clavate or ob- 
long, 20-27 by 38-56 /X, rounded above, more or less narrowed below, 
somewhat constricted at septum; wall dark cinnamon-brown, paler to 
colorless below, very thin, 1 ix or less, much thicker at apex, 5-10 jx, 
smooth; pedicel colorless, 35-60 long. 
An Eriosporangium-like species, having no aecial peridium, and 
with readily collapsing teliospores that germinate in the sorus at 
maturity. It differs from P. Cunilae Diet, by the broader aeciospores, 
the presence of uredinia, and the shorter, apically thickened, and more 
colored teliospores. 
170. Puccinia nesodes Arth. & Holw. (on Scrophulariaceae). 
Castilleja communis Benth., Santa Maria de Jesus, Volcan de Agua, 
Dept. Sacatepequez, March 4, 1916, 55/; Panajachel, Dept. 
Solola, Jan. 3, 1917, 673. 
Castilleja tenuiflora Benth., Solola, 5300 feet alt., Jan. 27, 1915, 125 
(with Cronartium coleosporioides (Diet. & Holw.) Arth.) ; 
Antigua, Dept. Sacatepequez, Dec. 28, 191 6, 6^j. 
Castilleja sp., Panajachel, Dept. Solola, Jan. 3, 191 7, 66q. 
A short-cycle rust occurring also in Costa Rica on species of La- 
mourouxia. 
