292 PROCEEDINGS OP THE AMERICAN ACADEMY 



MODIOLA, Moench, with a partition between the two seeds and a 

 habit of its own, will of course be kept up. 



Nevada. Passes into var. angustiloba. with very narrow divisions to leaves, 

 the Malvastrum coccineum, var., Gray, PI. Wright, i. 17. 



++ ++ Leaves undivided, at most obtusely 3-5-lobed, of roundish outline, mostly 



cordate. 

 = Canescent throughout with short and close stellular pubescence, no loose 

 woolliuess : carpels wholly pointless. 

 S. MuNROANA, Spach. Mulva Munroana, Dougl. in Lindl. Bot. Reg. t. 1306. 

 Nultallia Munroana, Nutt. in Jour. Acad. Philad. vii. 16. Malvastrum Munroanum, 

 Gray, PI. Fendl. 21, excl. syn. Chiefly of the northern interior region from the 

 British boundary to Nevada, Utah, and probably Arizona, where with lobed 

 leaves it comes very near the preceding. The flowers are brick-red, I believe, 

 though the published figures make them rose-red, and tlie calyx is short, not 

 surpassing the depressed small fruit. 



S. AMBiGUA. S. Einoryi, Terr, in Ives Colorado Exp. Bot. 8 ; Watson, Bot. 

 Calif. 1. c, partly, not PI. Fendl. nor PI. Wright. Less leafy than the preceding, 

 more tomentulose, with commonly thicker and merely crenulate-toothed leaves, 

 more naked and racemiform inflorescence ; petals rose-color varying to white, 

 lialf-inch to inch long ; calyx 4 to 6 hnes long, with acute or acuminate lobes 

 surpassing the moderately depressed fruit, the carpels of which are commonly 

 3 lines long, very like those of S. Munroana, but larger, quite unlike those of 

 S. Emoryi, Torr., with which some forms have been confounded. It seems to be 

 abundant over the arid plains of Arizona and Nevada ; also coll. in S. California 

 by Thurber, Nevin, Cleveland, &c. 



S. SULPHUREA, Watson, Proc. Am. Acad. xi. 125, is a peculiar species of the 

 Lower Californian Islands, with rather the habit of the original S. cisplatina, 

 St. Hil. It is said to have pale yellow flowers. 



= = Densely pannose-tomentose and calyx very woolly : corolla rose-red : ovules 

 often 3 : carpels when mature much constricted in the middle. 

 S. LiNDHEiMERi, Gray, PI. Lindh. ii. 162. S. Texas and adjacent Mexico. 

 •»-»■•«■++ Leaves imdivided, of oblong-lanceolate outline, not rarely subhastately 

 3-lobed : pubescence close and canescent : petals orange-red : mature carpels 

 ovate, with deep reniform excision, tipped with a small and deciduous cusp, 

 often 2-seeded. 



S. HASTULATA, Gray, PI. Wright, i. 17, ii. 21. S. Texas and adjacent New 

 Mexico and Mexico. 



* * True Sphceralcece, with fruit less or not at all depressed : carpels 2-3-ovulate, 

 1-3-seeded, mostly oblong and with some ventral excision, disposed to dorsal 

 as well as ventral dehiscence, when separating from the axis colieriiig by 

 their sides and at base held by a kind of thread which at lengtli either tears 

 away from the back of the carpel or else is carried away with it : perennial 

 herbs. 



I- Carpels canescent or glabrate on the back : leaves not Maple-like, 

 ++ Lanceolate to linear, not lobed, rarely even incised. 

 S. ANGUSTiFOLiA, Spach, 1. c. The genuine species, with wholly pointless 

 carpels having rounded summit and smooth or obscurely rugose sides, is wholly 



