Dalea. LEGUMINOSiE. -j.^! 



In the Coast Eanges, near the sea, from Marin Co. (Bolanchr) to San Die"-o Co It closelv 

 resembles A. fruticosa of the Atlantic States, but differs in the shape and pubescence of the pod 

 the more acute calyx-teeth, and the almost spinescent glands. These last, however, are some- 

 times entn-ely wantmg. Some of the specimens from ilarin Co. are remarkable for consincuous 

 stipules and larger bracts. 



11. DALEA, Linn. 

 Calyx nearly equally 5-cleft or toothed. Standard cordate, its claw free : wings 

 and keel usually longer ; their claws adnate to and jointed upon the cleft stamineal 

 tube. Stamens 10 (sometimes 9), monadelphous ; anthers uniform. Ovary 2- 

 (rarely 4-6-) ovuled. Pod ovate, compressed, usually indehiscent, included in the 

 calyx, 1 - 2-seeded. — Herbs or shrubs, glandular-punctate ; leaves unequally pin- 

 nate, very rarely digitately 3-foliolate or simple ; leaflets small, entire, sometimes 

 stipellate ; stipules small, subulate ; flowers nearly sessile in terminal pedunculate 

 spikes or rarely solitary. 



An American genus of nearly 100 species, a dozen natives of South America, 50 Mexican, and 

 the rest belonging to the warmer portions of the United States. The Californian species are con- 

 fined to the southeastern desert region. 



Petalostemon, Michx., is a similar genus, differing in having only five stamens, the flowers 

 always in dense bracteate cylindrical spikes. There are over 20 species, confined to the United 

 States, several as far westward as Central Arizona, Utah, and the basins of the Snake lliver and 

 Columbia, but none have been found near the borders of California. 



§ 1. Claivs of the ivings and keel adnate to the stamen-tube nearly to their middle : 

 ovides a single pair. — • Dalea proper. 



* Herbaceous: flowers erect or ascending, in dense spikes, with conspicuous bracts: 



calyx very villous, with long slender teeth : leaflets several or many. 



No species of this group of the genus have been collected in California, but the following 

 approach it and some of them may yet be tound. ° 



.p. BRACHYSTACHYS, Gray. A low glabrous annual : flowers yellow, in globose or oblong 

 spikes : bracts villous-ciliate, somewhat persistent : leaflets about 5 pairs. — S. Arizona to New 

 Mexico. 



p. ALOPECUKOIDES, Willd. A rather tall glabrous annual : flowers light rose-color, in cylin- 

 drical spikes : bracts pubescent, scariously margined, deciduous : leaflets 10 to 20 pairs. — From 

 Southern Arizona eastward to the Mississippi. 



D. L^viGATA, Gray. A tall glabrous perennial : flowers yellow or white, in cylindrical spikes : 

 bracts very silky, somewhat persistent : leaflets many pairs, very small. — From Southern and 

 Central Arizona to New Mexico. 



D. ALBIFLORA, Gray. A tall pubescent perennial : flowers white, in cylindrical spikes ; bracts 

 narrow, very silky, deciduous : leaflets 8 to 16 pairs, small. — From Central and Southern Arizona 

 to New Mexico. 



D. NANA, Torr. A low silky biennial or perennial : flowers yellow, in short thick spikes ; 

 bracts very silky, deciduous : leaflets 2 or 3 pairs, oblong, obtuse. — From Central and Southern 

 Arizona to Texas and Mexico. 



* * Herbaceous or somewhat woody at base: flowers spreading or deflexed, in rather 

 loose spikes: bracts narrow, deciduous: calyx villoics or pubescent, tvith mostly slender 

 teeth. 



1. D. mollis, Benth. Herbaceous, branching from a biennial or perennial root, 

 low (3 to 6 inches high), silky-villous Avith more or less spreading liairs : leaflets 

 3 to 7 pairs, obovate to cuneate-oblong, 1 to 4 lines long : flowers crowded in oblong 

 shortly pedunculate heads, white or rose-colored : bracts lanceolate, acuminate, vil- 

 lous : calyx very villous, 2 or 3 lines long ; the filiform plumose teetli much longer 

 than the tube and exceeding the corolla. — PI. Hartw. 306 ; Gray, PI. AVright. i. 47. 

 At Fort Mohave {Cooper) ; on the Colorado (Newberry) ; and eastward to New Mexico. First 

 collected by Coulter, probably in S. Arizona. 



