100 LEA.FLFTS. 



At 8000 feet in the Soldier Mountains, Idaho, L. P. Hender- 

 son, 16 July, 1895. U. S. Herb. Species curiously simulating 

 in a degree, the common Chickweed. 



-t— -(— Pubescence spreading. 



6. A. COSTATA. Low, stoutish, rather rigidly ascending, 

 much branched and with short iuternodes twice exceeded by the 

 firm light-green ascending foliage ; stem with hirtellous and 

 gland-tipped hairs intermixed, none retrorse: leaves oval to 

 ovate-elliptic, faintly feather-veined, scabro-puberulent above, 

 almost hirtellous beneath, minutely and closely hispid-ciliolate ; 

 inflorescence terminal and contracted, pedicels less than i inch 

 long: calyx -tube 10-ribbed; teeth ovate-deltoid, acute or acum- 

 inate : lobes of petals broad, each with a lateral tooth. 



Extreme northern California and adjacent Oregon. Species 

 based primarily on my n. 900 from Yreka as in my own herbar- 

 ium. I have it also from Butte Co., by Mrs Austin, and 

 Kellogg & Harford's n. 83 from Oregon may in part be referred 

 here. It is the only species in which ten quite prominent ribs 

 occur in place of the usual nerves or angles of the calyx. 



7. A. NODOSA. Stems 6 or 8 inches high, much branched 

 dichotomously from toward the base, all the internodes slender 

 but the nodes more than usually swollen, the many flowers borne 

 above the main foliage: leaves 1 to li inches long, firm, spread- 

 ing, elliptic-lanceolate, acute, sparsely beset on both faces and 

 more closely so on the margin with spreading mostly gland-tip- 

 ped short hairs, the stems more densely so clothed and with no 

 retrorse pubescence : slender pedicels and rather long calyx vis- 

 cid-hirtellons, teeth of the latter deltoid and short : corolla 

 large for the plant ; lobes of petals oblong, obtuse. 



Wenatchee, eastern Washington, in damp ground along Beaver 

 Creek, Kirk Whited, IT July, 1896, U. S. Herb. 



8. A. MACILBNTA. Herbage of a vivid green, thin and deli- 

 cate in texture, but the plants large, a foot high or more, branched 

 from the base, amply leafy and loosely floriferous; the stem with 

 no retrorse pubescence, scantily and delicately hirtellous and 



