CATALOGUE. 99 



sessile, a line and a half long-: filaments and pubescent style slightly 

 exserted : pod 3 or 4 lines long, attenuate at base. — New Mexico and 

 Arizona, rarely collected; near Santa Fd, Rothrock (91). Plate II.* 



Amorpha fkuticosa, Linn. — In its various fcrms from Winnipeg Valley 

 to Texas and New Mexico and eastward to the Atlantic ; at Willow Spring, 

 Ariz., at 7,200 feet altitude, Rothrock (244), apparently the typical broad- 

 leaved form, in flower, and resembling specimens collected at San Diego, Cal., 

 by Palmer (G5), in 1875. Only the fruit will determine positively whether 

 it be not A. Califomica, Nutt., which has a shorter and broader pod than 

 the Eastern species, and usually more slender and acute calyx-teeth. 



Petalostemon candidus, Miclix. — From the Saskatchewan to Arizona 

 and eastward to Michigan and the Mississippi ; at Willow Spring, Ariz., 

 Rothrock (248), and Cosino Caves, Loew (192). 



Petalostemon tenuifolius, Gray (Proc. Am. Acad, xi, 73). — Peren- 

 nial, branching, pubescent or glabrate, low : leaflets 3 to 5, linear or revo- 

 lute-filiform, 3 to fi lines long, about equalling the petiole, sparingly gland- 

 ular : spikes ovate to cylindrical, dense, rather long-pedunculate ; bracts 

 ovate, rather abruptly attenuate into a long awn, densely silky- villous as well 

 as the calyx : calyx-teeth lanceolate, attenuate, equalling the tube : petals 

 rose-colored ; standard round-cordate, hooded. — Western Arkansas to New 

 Mexico; Arizona, Rothrock (81) Plate II. f 



Dalea alopecuroides, Willd. — From Sonora to Colorado and eastward 

 to Texas and Southern Illinois; Arizona or New Mexico, Loew (274). 



Dalea albiflora, Gray (PL Wright, ii, 38). — Perennial, herbaceous, 

 erect, more or less hoary-pubescent, a foot high or more : leaflets small, 1 

 to 15 pairs, narrowly oblong, obtuse, smoother above, 2 or 3 lines long : 

 spikes cylindrical, dense and densely white-silky; bracts subulate-setaceous, 

 exceeding the calyx : teeth of the calyx subulate, a little shorter than the 

 tube: petals white. — New Mexico to Sonora; Camp Bowie, Ariz. (502). 



* A. Branch ; natural size. Fig. 1. Flower. Fig. 2. A vertical section through flower. Fig. 3. 

 Staruineal tube laid open. Fig. 4. Mature legume. Fig. 5. A vertical section through the same, showing 

 the seed and embryo. All except the branch enlarged about five diameters. 



tB. A branch somewhat reduced. Fig. 6. A bract from beneath the flower. Fig. 7. A flower seen 

 from the side. Fig. 8. A flower seen from above, with, four petals on the stamineal columrj, and the tifih 

 on tho calyx. Fig. 9. A section through the pod, with the seed in position. All except the branch 

 enlarged about five diameters. 



