40 PLANT.E WRIGHTIAN^. VI. 



but scarcely thicker than the petiole, channelled on the upper side; when tliree, 

 manifestly digitate ; when five, the additional pair inserted one or two lines lower 

 down. Peduncles one or two inches long. Spike silky-villous, 2 or 3 lines in 

 diameter in flower ; in fruit becoming half an inch long. Calyx a line and a half 

 long. Lamina of the petals half a line long; vexillum round-cordate; the wings 

 very oblique, nearly the length of the keel. Ovary villous. — Cultivated, from seeds 

 communicated by Mr. Wright, in the Cambridge Botanic Garden, the much- 

 branched stems attain a foot or more in height. 



D. Wrightii, Gray, PL Wright, p. 49. Stony hills near El Paso ; May. (1355.) 

 — " FloAvers yellow, turning purplish." 



D. Jamesii, Torr. %■ Grai/, Fl. 1. p. 308 ; Grai/, PL Wright, p. 49. Stony hills on 

 the Pecos and the Limpio ; June. (993.) 



D. cALYcosA (sp. nov.) : suffruticulosa, cinereo-puberula ; caulibus ramosissi- 

 mis decumbentibus ; foliolis 7 - 14-jugis cum impari obovatis ovalibusve retusis 

 juxta incisuram unipunctatis supra glabris subtus nunc glabratis ; spicis breviter 

 pedunculatis oblongis modice densifloris ; floribus post anthesin recurvis ; bracteis 

 lanceolatis calyce brevioribus caducis ; dentibus calycis obliqui villosi lato-lanceo- 

 latis tubo duplo longioribus ; petalis albo-purpureis, vexillo reniformi alisque carina 

 dimidio brevioribus. — Hills near the Deserted Rancho, on the San Pedro, Sonora; 

 Sept. (994.) — Stems a span long, slender, from a sufFrutescent base. Stipules 

 subulate. Leaflets 2 or 3 lines long, minutely and often sparsely strigose-pubescent 

 underneath. Spikes 1 to 2 inches long, with the flowers contiguous but not com- 

 pact. Calyx campanulate, oblique, 3 lines long, sparsely villous ; the short tube 

 glandular-dotted between the ribs ; the lobes remarkably long and large for the 

 genus, greenish, about the length of the vexillum and oblique wings. Keel 

 (2-3 lines long) and wings apparently white marked with rose-purple, the 

 vexillum bright purple. Legume orbicular, flat, apparently 2-valved, one-seeded. 

 Ovules 2.* 



* The species of Dalea described or enumerated in this and the former memoir, and in Planta Fend- 

 leriancB and PlantcB Undheimeriance, are so numerous as to render an artificial conspectus convenient. 

 The species may be disposed as follows : — 



» Calyx profunde quinquefidus ; lobis lato-lanccoJatis suhfoliaceis. D. calycosa. 



» * Calyx villosissimus, dentibtis setaceis vel subulatis, 



-(- FrutiooscE, glabroB, multijugatse ; spicis paucifloris. D. Formosa. 



•t- -t- Ilerbaceoe, glabrae ; foliis 5 - 6-jugis ; spicis multifloris. 



Pei'ennes. Bracteas cymb8Bformes,scarioso-marginat8B, glaberrimiB, persistentes. 



Spica laxiflora, plumosa. Corolla flava. Stamina 9. D. laxifloea. 



Spica densiflora. Corolla purpurea. 



Calycis denies setacei, plumosissimi, tubo longiores. D. pogonathera. 



Calycis dentes subulati, villosissimi, tubo breviores. D. lasiathera. 



Annul. Bractese villoso-ciliatse, immarginatse. 



BracteiB subpersistentcs : spica globosa vel oblonga : corolla flava. D. brachystachys. 



BracteoB persistentes : spica cylindrica : corolla albida. D. polygonoides. 



BractejB caducffi : foliola filiformia : corolla purpurea. D. filiformis. 



