WOOTOJSr AND STANDLEY — FLOEA OF NEW MEXICO. 351 



Bracts caducous; leaflets filiform; pe- 

 duncles very slender; corolla pur- 

 ple 10. P. filiformis. 



Bracts persistent; leaflets oblong, pe- 

 duncles short and stout; corolla 

 yellow or white. 



Corolla yellow; spikes globose 9. P . hrackystachys. 



Corolla white; spikes cylindric 8. P. polygonoides. 



Plants more or less pubescent throughout; perennials. 

 Spikes lax; plants prostrate, densely pubescent; 

 flowers purple. 



Calyx tube villous, the lobes lanceolate 15. P. lanata. 



Calyx tube glabrous, the lobes short-triangular. 16. P. tenninalis. 

 Spikes densely flowered, mostly erect; plants at 

 least ascending; pubescence various; flowers 

 variously colored. 

 Flowers white, in strict terminal spikes; plants 

 finely appressed-pubescent throughout. 

 Leaflets very small, about 3 mm. long, 15 



to 20 pairs 12. P. ordiae. 



Leaflets larger, 5 to 7 mm. long, 10 to 12 



pairs 13. P. albiflora. 



Flowers blue, yellow, or purple; pubescence 

 various. 

 Spikes comparatively few-flowered, glo- 

 bose; flowers blue; calyx lobes short; 



plants canescent 14. P. scoparia. 



Spikes at least oblong, usually considerably 

 elongated, 1 cm. thick or more; flow- 

 ers yellow or purple ; calyx lobes seta- 

 ceous; plants sericeous or villous. 

 Leaves glandular-punctate; spikes very 

 thick and much elongated. 



Stems sericeous, not glandular 18. P. aurea. 



Stems tuberculate, black-glandu- 

 lar, minutely pubescent 19. P. lachnostachys. 



Leaves not glandular- punctate ; spikes 

 smaller. 



Leaves pahnately trifoliolate 20. P. jamesii. 



Leaves pinnate. 



Spikes sessile; leaflets acute... 21. P, wrightii. 

 Spikes short, pedunculate ; 



leaflets obtuse 22. P. nana. 



1. Parosela calycosa (A. Gray) Heller, Cat. N. Amer. PI. ed. 2. 5. 1900. 

 Dalea calycosa A. Gray, PI. Wright. 2: 40. 1853. 



Type locality: "Hills near the Deserted Rancho, on the San Pedro, Sonora." 

 Range: Southwestern New Mexico, southern Arizona, and adjacent Mexico. 

 New Mexico: Cactus Flat; Mangas Springs. Dry hillsides, in the Upper Sonoran 

 Zone. 



2, Parosela frutescens (A. Gray) Vail, Contr. U. S. Nat. Herb. 8: 303. 1905. 

 Dalea frutescens A. Gray, Bost. Joum. Nat. Hist. 6: 175. 1850. 



Type LOCALriY: "Rocky hills and high plains, along the mai^ins of thickets, on 

 the Guadelupe, Sabinas, and i*edernales, " Texas. 



