68 



BOTANY. 



stipe, obovate ; style longer than the ovary."— (Torr. Fremont's Report, 



p. 311.) Nevada. 



Polanisia uniglandulosa, DC.— Loew. New Mexico. 



Polajsisia graveolens, Raf— Upper Arkansas Valley, Colorado 

 (760); also New Mexico. 



violace^:. 



Viola Canadensis, L.— Western New Mexico, Valle Grande, Loew, 

 1873, and Apex, Colorado. (77 and 78.) 



Viola canina, L. — Colorado and Nevada. (75.) 



Viola cucullata, Ait. — Western New Mexico, at 6,500 feet altitude. 



Viola Nuttallii, Pursh. — Colorado, near Denver. (76.) Nevada. 



BIXINE^. 



Amoreuxia* Scheideana, Planch. (PL Wright. 1, tab. 3, and 2, tab. 

 12). — Glabrous or nearly so, 1° high, leaves on long petioles, orbicular in 

 outline, 7-9-parted, with the lobes obovate, cuneate at base and sharply 

 serrate toward the top ; capsule 1' long and nearly as broad, moderately 

 inflated ; seeds cunved and minutely roughened with short, scattering hairs ; 

 flowers deep orange, with brownish markings in the centre. Sanoita Valley, 

 Arizona. Altitude, 5,500 feet. (647 and 640 ) 



POLYGALEiE. 



Polygala alba, Nutt. — Perennial, with several slender virgate stems 

 ascending from the same root, smoothish, 1° high; leaves linear to oblan- 

 ceolate, sessile or barely petioled, margins slightly revolute ; stem leafy half 

 way to the summit ; flowers deciduous, leaving the rachis roughened after 

 their fall, white; wings of the calyx rounded, about as long as the corolla; 

 seed with caruncle extended into two ear-like lobes nearly as long as the 

 seed. Willow Spring, Ariz. Altitude, 7,195 feet. (207.) 



"Amoreuxia, Moc. et Sesa. in DC. Prod, ii, p. fi38. — Flowers hermaphrodite. Sepals 5, imbri- 

 cated, deciduous. Petals 5, large, contorted-imbricated. Stamens many, inserted upon the glandless 

 receptacle; anthers linear, bivalved, with short confluent lines of dehiscence under the apex. Ovary 

 perfectly 3-celled ; placentas united in the centre, ovules many ; Btyle simple, stigma minutely denticu- 

 late; endocarp membranous, separating into 3 valves alternating with those of the epicarp. Seeds obo- 

 void, straight or incurved, smooth, testa bony, surrounded by a loose exterior membrane; cotyledons 

 broad, curved, or with an incurved hook. — Bentham & Hookek. 



