OP ARTS AND SCIENCES. 363 



flowers and narrower calyx, and a much narrower pod attenuate to the 

 base but not stipitate. A. gracilentus is very simihir to A. Fendleri, 

 but the broader and shorter pod is not attenuate below, and is strictly 

 sessile. A. Greenei, Gray, is another nearly related species, having 

 a shorter and more pubescent calyx (2 lines long) and shorter corolla, 

 and the somewhat shorter pod strictly sessile. 



Desmodium Arizonicuji. Perennial, the herbaceous stems erect, 

 3 feet high or more, more or less coarsely pubescent ; branches slen- 

 der, elongated : leaves nearly sessile, o-foliate ; stipules linear-lanceo- 

 late, acuminate ; leaflets linear-oblong (the lower narrowly oblong), 

 obtuse or acutish, strigose above, more loosely hairy beneath, 1 to 2i 

 inches long : flowers small (2 or 3 lines long), on filiform spreading 

 pedicels (A inch long) in elongated racemes : pod slightly pubescent, 

 the joints suborbicular. — Collected by J. G. Lemmon in Arizona in 

 1881 (n. 540), and in the Santa Rita INIountains by C. G. Pringle, 

 1884. Closely allied to D. sessifolium and D. Hartwegianum, ditfer- 

 ing from the first in its greater pubescence, less acute leaflets, longer 

 racemes and pedicels, and less pubescent pods, — from the latter in 

 its narrower leaflets, branching inflorescence, much smaller flowers, 

 etc. 



Lathtrus Californicus. Stem stout, tall and more or less 

 winged : stipules semi-sagittate, dilated and often coarsely toothed, or 

 the upper narrower ; leaflets 3 to 7 pairs, ovate-oblong to linear-lanceo- 

 late, h to 2 inches long or more, acute or acuminate, softly pubescent 

 ou both sides, as also the rhachis : peduncles stout, nearly equalling the 

 leaves, many-flowered : calyx-teeth short (the lower 2 lines long or 

 less) ; petals 7 to 9 lines long, apparently yellowish or pinkish : pod 

 linear, 2 inches long by 3 lines broad, attenuate at base to a stipe. — 

 Alono- creek-banks in the valleys and foothills of California; referred 

 doubtfully in the Botany of California (as by Dr. Torrey) to L. veiw- 

 SM.s, as var. Californicus. Tliat eastern species, which reaches the 

 Saskatchewan region and Lake Winnipeg, does not appear west of the 

 Rocky ]\lountains. It has broad obtuse or retuse (rarely acute) 

 leaflets, narrower stipules, smaller purjile flowers, and the pods less 

 attenuate at base. 



Latiiyrus Bolanderi. Stems usually stout and tall, wingless ; 

 glabrous throughout or the calyx only ciliate : stipules dilated, semi- 

 sagittate, often toothed ; leaflets 3 to 5 pairs, oblong-lanceolate to 

 broadly ovate, obtuse or retuse or acute, h to 1 \ or 2 inches long : 

 racemes about eiiualling the leaves, 8-10-flowered : calyx-teeth broad, 

 the lowest elongated ; petals purple, 6 to 9 lines long : pods linear, 



