290 PROCEEDINGS OP THE AMERICAN ACADEMY 



of the bracts of the involucel is inconstant and of no account. The 

 large and thin mellifluous disk, wholly aduate to the calyx-tube, is well 



-^ -^ ■<- Cinereous with lepidote-stellular pubescence, perennial, with foliaceous- 

 involucellate flowers solitary and subsessile in upper axils, and with rather 

 large deep yellow petals : carpels coriaceous, smooth, hirsute at top, there 

 dorsally bigibbous and ventrally subulate-pointed. 



M. Wkightii, Gray, PI. Fendl. 21, PI. Lindh. ii. 160, & Gen. 111. ii. 60, t. 131. 

 Maha aurantiaca, Sclieele in Linnaea, xxi. 469, therefore Malvastrum aurantiacum, 

 Walp. Ann. ii. 153. Texas. 



* * * Peduncles or pedicels short : petals scarlet, copper-color, or rose-color : 

 carpels wholly pointless : involucel of slender deciduous bracts or hardly any. 

 Western perennials, some shrubby, canescent or tomentose with many-rayed 

 stellular pubescence. 



•*- Pubescence wholly lepidote and silvery, i. e. of peltate scales rather than 

 hairs : leaves very narrow : carpels coarsely reticulated on the sides. 



M. LEPTOPHTLLUM, Gray, PI. Wright, i. 17, ii. 20. S. W. Texas to S. Utah. 



■<- ■*- Canescent-tomentose with short pubescence, but calyx, &c., hirsute : 

 mature carpels thin-walled, promptly 2-valved, smooth, suborbicular : flowers 

 said to be rose-color. 



M. Palmeri, Watson, Proc. Am. Acad. xii. 250, Bot. Calif, ii. 437. Has rather 

 large long-pelioled leaves, and a few rather large flowers in a capitate cluster at 

 summit of a terminal peduncle. Collected only by Dr. Palmer near San Luis 

 Obispo, California. 



M. DENSiFLORUM, Watson, Proc. Am. Acad, xviii. .368. Has numerous rather 

 small flowers crowded in sessile heads, forming an interrupted spike. S. Cali- 

 fornia, Parish, Nevin. 



4- -1- 4- Throughout densely stellate-tomentose, no hirsute hairs on calyx : car- 

 pels thin-walled, smooth, promptly 2-valved, oval witli excised insertion : 

 leaves thickish, obscurely lobed : calyx-lobes long-acuminate ; petals rose- 

 color. 

 M. MARRUBioiDES, Durand & Hilgard, in Jour. Acad. Philad. ser. 2, iii. 38, & 

 Pacif. R. Rep. v. 6, t. 2. M.foliosum, Watson, Proc. Am. Acad. xx. 356. Orcutt 

 collects this in the northern part of Lower California ; with a var. panicdlatum, 

 having copious and loosely paniculate flowers, some of them rather slender- 

 pedicelled. 



M. Fremonti, Torr. in PI. Fendl. 21. Throughout very densely soft-tomen- 

 tose, and calyx most densely woolly ; the plant so much resembling SpJurrnlcea 

 Lindheimeri of Texas, that in Bot. Calif, i. 86 it was mistaken for that. This is 

 wholly Californian, from Calaveras Co. southward. 



1- 4- •(- -)- 13oth lierbage and calyx canescent with close and fine almost scurfy 

 stellular pubescence, no hispid or hirsute hairiness. 



■*-<• Frutescent or truly shrubby, 3 to 15 feet high : leaves barely lobed : mature 

 carpels smooth, glabrate, thin-walled, 2-valved : petals rose-purple. 



M. Thurberi, Gray, PI. Thurb. 307 ; Bot. Calif, i. 85. Malvafascicuiala, Nutt. 

 in Torr. & Gray. Has sessile or short-ped uncled flower-clusters, spicately or pa- 

 niculately disposed on virgate and nearly naked branches : is common in Cahfor- 



