36 Contributions from the Gray Herbarium 
pubescens) has also been used by Muhlenberg, Nuttall, and Schlech- 
tendal, but in none of these cases for a valid species. 
38.1. P. tenuiloba, sp. nov. Suffruticulosa erectiuscula pluri- 
caulis 13.5-21.5 em. alta. Caules sparse ramosi ut inflorescentia 
griseo-incurvo-puberuli. Folia inferiora oblonga obtusiuscula mu- 
cronata nervis lateralibus 1-jugis sparse appresse puberula 8-14 
mm. longa 3-3.5 mm. lata brevissime petiolata; media et superiora 
lanceolata vel lineari-lanceolata acuta involuta subdense puberula 
pilis incurvis 1.7-2.5 em. longa 2.5-4 mm. lata. Racemi laxissime 
pauciflori 2-3.8 cm. longi. Sepala ovato-lanceolata vel lanceolata 
acuta pubescentia 2.2 mm. longa. Alae ovales apice rotundatae 
sparse pubescentes 3.5 mm. longae 2.4 mm. latae. Carina glabra 
4 mm. longa. Petala superiora obovata 3 mm. longa. Capsula 
sparse ciliolata ovalis vix emarginata 7 mm. longa 4 mm. lata. 
Semen anguste oblongo-obovoideum pilosum 4 mm. longum. Aril- 
lus trilobus umbone corneo pilosulo, lobo dorsali lanceolato acuto 
searioso descendente 1.3 mm. longo, lobis lateralibus 1 mm. 
longis. — ARIZONA: oe of the Santa Rita Mts., April—July 
1884, Pringle p. p. (TyPE: K). 
The type cine didecbicte as P. puberula, includes also 
the type of the very distinct spreading-pilosulous P. orthotricha 
(no. 32.1). Their occurrence in extreme southern Arizona makes 
their subsequent discovery in Mexico a matter of great proba- 
t 
39. P. potyMorpHa Chod. Stems few from a perennial base, 
slender, appressed-pubescent, 1-2 dm. long. Leaves varied, from 
ovate or lance-oblong to linear-lanceolate or linear, mucronate, 
sparsely minutely appressed-puberulous, paler beneath, thin or 
chartaceous, 2—-3.5 em. long, 3-17 mm. wide. Racemes terminal, 
few-flowered; nedicaie 2.5-5 mm. long. Flowers 6-7 mm. long. 
Sepals lance-linear, acute, pubescent. Wings glabrous, oblong- 
elliptic, scarcely unguiculate at base. Upper petals shorter than 
the elongate keel, with scarcely dilated obtuse or subspatulate 
limb. Filaments slightly ciliate at base. Capsule oblong, with 
broadish sinus, hirsute, cuneate at base, 9 mm. long, 5 mm. wide. 
Seed pyriform, hirsute. Aril capitelliform, with two slender de- 
scending lateral lobes a third as long as the seed, and a prolonged 
twisted dorsal lobe. — Chod. Bot. Jahrb. lii. Beibl. 115. 74 (1914), 
as P. polymorphum. — Based by Chodat on Seler 3130 from lime- 
