192 PROCEEDINGS OP THE AMERICAN ACADEMY 



The leaves are occasionally opposite, as in M. fontana, which in turn 

 sometimes has one of a pair reduced to a scarious bract. The valves 

 of the capsule in this species are shown by the microscope to be beau- 

 tifully cancellated. 



Astragalus Matthewsii. Very shortly caulescent and cespitose, 

 villous-pubescent with rather short subappressed hairs : leaflets about 

 12 pairs, obovate to oblong-obovate, 2 to 5 lines long: peduncles 

 equalling the leaves, bearing loose racemes with green lanceolate 

 bracts : calyx campanulate, the lanceolate acuminate teeth half the 

 length of the tube ; corolla purple, about 9 lines long, twice longer 

 than the calyx : pod inflated, membranous, 2-celled, sessile, broadly 

 ovate, acuminate, densely white-villous, 9 lines long. — At Fort Win- 

 gate, New Mexico ; collected by Dr. W. Matthews, U. S. A. Allied 

 to A. Biyelovii. 



Astragalus (IIomalobus) Wingatanus. Near A. multijlorus, 

 scarcely 6 inches high, somewhat canescent with appress'^d pubes- 

 cence : leaflets 4 to 6 pairs, narrow, glabrate : calyx short and shortly 

 toothed ; corolla purplish, 3 lines long : pod as in A. multijlorus but 

 sessile, obtuse or somewhat narrowed at base, rather more acute at the 

 apex. — At Fort Wingate, New Mexico (Dr. W. Matthews, 1882) ; 

 collected in New Mexico also by Dr. E. Palmer in 1870 (14 and 61). 



Astragalus hypoxylus. Perennial, with a prostrate branching 

 woody base and short slender herbaceous branches : leaves glaucous, 

 canescent with a fine appressed pubescence ; leaflets 4 to 6 pairs, 

 obovate to oblong-obovate, obtuse, 1 to 3 lines long ; stipules distinct, 

 triangular-ovate : peduncles slender, exceeding the leaves (3 inches 

 long) ; racemes short and close : calyx-teeth narrow, equalling the 

 short-campanulate tube ; corolla 3 lines long : pod sessile, chartaeeous, 

 oblong and turgid, sulcate on the back and 2-ceIled by the intrusion 

 of the dorsal septum, 3 or 4 lines long. — Collected at Maloney's 

 Ranch, in the Iluachuca Mountains, Southern Arizona, by J. G. 

 Lemmon, in July, 1882. Allied to A. Cobrensis and A, Arizonicus. 



Spir^a (Filipendula) occidentalis. An herbaceous peren- 

 nial, 2 to 6 feet high, the simple stem glabrous or nearly so : leaves 

 appressed-silky on the veins beneath, 5-7-lobed, the lobes acute or 

 acuminate, doubly lacerate-toothed, the petiole with 1 to 5 pairs of 

 reduced ovate to narrowly lanceolate toothed leaflets ; stipules broad : 

 inflorescence a compound cymose panicle, pubescent with short some- 

 what appressed hairs : petals white, elliptical, sessile, 2 or 3 lines long : 

 carpels about 9, erect, narrowly lanceolate, long-stipitate, beaked by 

 the elongated style and villous (especially on the margin) from the 



