472 PROCEEDINGS OF THE AMERICAN ACADEMY 



cal with the sutures approximate, nearly straight, acutish, the very 

 short beak abruptly incurved. — Common in sandy soil in Bear Valley, 

 San Bernardino Mountains, at 6,000 feet altitude ((7. C. Parry, 1876 ; 

 S. B. Parish, June, 1886) ; in the Sierra Nevada, near Sonora Pass, 

 at 10,000 feet altitude {W. H. Brewer, July, 1863). With fewer 

 leaflets, smaller flowers and pods, and shorter peduncles than any 

 other species of the group. Occasionally some of the lower leaves are 

 perfectly glabrous. 



The limits of A.injlexus and A. Purshii of this group are very diffi- 

 cult to define. From a study of a considerable amount of material, 

 it aj^pears that normal A. inflexds is usually rather tall, covered 

 throughout with a long soft villous pubescence, the calyx-teeth long- 

 attenuate and lax, and the pods usually an inch long, strongly arcuate 

 and acuminate. It is found in Oregon, Washington Territory, and 

 northwestern Nevada. — A. Purshii is low and cespitose, often 

 dwarf, the pubescence shorter and closer, the calyx-teeth shorter and 

 usually straight, the pod varying much in length and in amount of 

 pubescence. The flowers vary in color, size, and breadth of the calyx, 

 and the pubescence in its villosity. Forms occur that are not with 

 certainty distinguishable from A. injlexus. It was originally described 

 as having flowers an inch and a half long ; they are about 8 or 10 lines 

 in length, and are no larger in Douglas's specimens in herb. Kew. It 

 ranges from Fraser's River to northern Idaho, northwestern Wyoming, 

 northern Utah and Nevada, Siskiyou County, California, and in the 

 eastern foothills of the Sierra Nevada to Tejon Pass and the San 

 Bernardino Mountains. 



Philadelphus Coulteri. Six to eight feet high, with slender 

 hanging branches ; branchlets subappressed-pubescent : leaves lanceo- 

 late, acute, rounded at base, sparingly denticulate, densely white-pu- 

 bescent beneath, the upper surface more sparsely substrigose-pubescent 

 and when young glandular-puberulent, 1 or 2 inches long : flowers 

 mostly solitary, very fragrant, an inch broad or more, the calyx and 

 short pedicel densely white-silky : summit of the ovary somewhat 

 hairy. — Zimapan (77 Coulter) ; foothills of the Sierra Madre near 

 Monterey, Mexico (0. S. Sargent, April, 1887). Differing from 

 P. Mexicanus, to which Coulter's specimen has been referred, in its 

 dense pubescence, the non-acuminate leaves, and the hairy summit of 

 the ovary. 



Cotyledon attenuata. Short-caulescent, and the stem shortly 

 branched; flowering stems several, slender, 6 to 8 inches high: leaves 

 numerous, scattered, abruptly narrowed from the clasping base, sub- 



