36 Contributions from the Gray Herbarium 



pubi sc( ns) has also been used by Muhlenberg, Nut tall, and Schlech- 

 tendal, bu1 in none of these cases for a valid species. 



38.1. 1'. tenuiloba, sp. nov. Suffruticulosa erectiuscula pluri- 

 caulis L3.5 21.5 cm. alta. Caules sparse ramosi ui inflorescentia 

 griseo-incurvo-puberuli. Folia inferiora oblonga obtusiuscula mu- 

 oronata nervis lateralibus 1-jugis sparse appresse puberula 8-14 

 nun. longa 3-3.5 mm. lata brevissime petiolata; media etsupcriora 

 lanceolata vel lineari-lanceolata acuta involuta subdense puberula 

 pilis incurvis 1.7-2.5 cm. 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 

 -1 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, Jobo dorsali lanceolato acuto 

 scarioso descendente 1.3 mm. longo, lobis lateralibus 1 mm. 

 longis. Arizona: foothills of the Santa Rita Mts., April-July 

 1884, Pringle p. p. (type: K). 



The type collection, distributed 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- 

 bility. 



39. P. polymorpha 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 cm. long, 3-17 mm. wide. Racemes terminal, 

 few-flowered; pedicels 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- 



