4:56 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



24. Flowers purple or white (28). 



28. Bracts conspicuously scarious-margined, prominently glandular- 

 punctate; leaflets 3 to 7, glabrous; calyx lobes setaceous, 

 plumose, longer than the tube; corolla purple; stems herbaceous 



from a woody caudex 27. D. pogonathera. 



28. Bracts not conspicuously scarious-margined or prominently 

 punctate (29). 

 29. Bracts densely hirsute dorsally toward the base, glabrate above, 

 conspicuously ciliate; calyx lobes pilose, shorter than the 

 tube; spikes ovoid, compact, 6 to 8 mm. thick; leaflets 17 

 to 41, linear-lanceolate, 4 to 10 mm. long; stems herbaceous 

 from a woody caudex; corolla white, fading pink. 



28. D. LUMHOLTZII. 



29. Bracts either glabrous or pubescent, but not as in D.lumholtzii 



(30). 



30. Paired petals inserted below the middle of the staminal 



tube; spikes capitate or subcapitate, rarely ovoid or short- 



cylindric; plants shrubby or suffrutescent ; calyx lobes long, 



plumose; flowers purple (31). 



31. Branches and leaves glabrous, the latter usually less than 



10 mm. long; leaflets 7 to 15, 1.5 to 2.5 mm. long, 



thickened . in dried specimens strongly involute or 



conduplicate; calyx tube 3 to 4 mm. long, the lobes 



4 to 10 mm. long, setaceous; flowers normally not 



crowded 29. D. Formosa. 



31. Branches and leaves pubescent or, if glabrous, then the 



leaflets plane and thin; leaflets mostly larger and 



calvx lobes shorter, the latter subulate-setaceous; flowers 



crowded (32). 



32. Leaflets 5 to 7, abundantly sericeous-strigose, in dried 



specimens mostly involute or conduplicate. 



30. D. GREGGII. 



32. Leaflets 11 to 21, not sericeous, plane or somewhat 

 involute 31. D.wislizeni. 



30. Paired petals inserted above the middle of the staminal tube, 



short-clawed; spikes commonly cylindric, always dense; 



plants herbaceous above the caudex; leaflets 13 to 51 (33). 



33. Flowers purple; calyx lobes lance-subulate, commonly 



longer than the tube; paired petals oval or elliptic, the 



wings very short-clawed; stems and leaves glabrous. 



32. D. PRINGLEI. 



33. Flowers white; calyx lobes deltoid-subulate, shorter than 



or barely equaling the tube (34). 



34. Stems and leaves glabrous; claws of the wing petals very 



short; paired petals obliquely oblong; banner often 



drying purple 33. D. grayi. 



34. Stems and leaves pubescent; claws of the wing petals 

 longer, one-quarter to one-third as long as the blade. 



34. D. ALBIFLORA. 



1. Dalea fremontii Torr. in A. Gray., Amer. Acad. Arts and Sci. Mem. 

 ser. 2, 5: 316. 1855. 



Psorodendr on fremontii Kydb., North Amer. Fl. 24: 43. 1919. 



Western Mohave County, up to 3,000 feet, April and May. Southern 

 Utah to southeastern California, and Arizona. 



The species is represented in Arizona mainly by var. johnsoni 

 (Wats.) Munz, which has 5 to 11 linear or linear-oblanceolate leaflets. 

 A collection at Wolf Hole, northern Mohave County {Peebles and 

 Parker 14751), with 1 to 7 oblong or elliptic leaflets, approaches the 

 typical form. 



Dalea californica S. Wats., distinguished from D. fremontii by decurrent or even 

 confluent leaflets, is not known certainly to extend into Arizona. 



