294 PROCEEDINGS OP THE AMERICAN ACADEMY 



Sida, as distinguished from Anoda, &c. To the peculiar sections 

 named in PI. Fendleriante, viz. Pseudo-Malvastrum (the N. American 

 species of which are S. hederacea, S. lepidota, and S. cuneifoUa, Gray) 

 and Pseado-Nafma, a third may be added, Calyxhymenia, for spe- 

 cies which have the ebracteolate calyx much accrescent around or un- 

 der the fruit, and membranaceous or scarious, — the name taken from 

 S. calyxhymenia. Gay, of Australia, and the section therefore including 

 the Fleischeria of Steudel and Steetz. Our species, *S'. physocalyx. 

 Gray, Pi. Lindh. ii. 163, in which the o-parted and augulate-bladdery 

 fruiting calyx imitates that of Nioandra, has rather peculiar and very 

 thin-walled reticulated indehiscent carpels with a beak-like apex. The 

 homonymous S. physocalyx of F. Miiller, from Australia, is much later, 

 and will find another name. Our species of the section 3Ialvinda appear 

 to be as follows, f 



+- 1- Carpels hirsute or hispid on the back: leaves Maple-shaped, compara- 

 tively large and with acute serrate lobes : tall herbs, green or at least not 

 canescent. 



S. ACERiFOLiA, Nutt. in Torr. & Gray, Fl. i. 228. S. rivuJaris, Torr. in PI. 

 Fendl. 23. Malva rivularis, Dougl. British Columbia to Rocky Mountains, 

 Dakota, and at a single station in Illinois. 



S. LEPTOSEPALA, Torr. Bot. Wilkes Ex. Exped. Washington Territory on the 

 Upper Columbia, coll. by Pickering and Brackenridge, and recently by Tweedy 

 and Brandegee. Well marked by the slender peduncles and caudate-attenuate 

 calyx-lobes. 



t SIDA, § Malvinda. 



1. Species with a somewhat Stylosanthoid habit; the sessile or short-peduncled 

 flowers mainly at the summit of the low stems or branches and involucrate by 

 petioled leaves: petals reddish-purple. 



S. ciLiARis, L. Reaches Florida, and includes S. involucrata, A. Richard, and 

 S. anomala, St. Hil. 



Var. FASCiccLATA, the narrow-leaved Texan and Mexican form of the species. 

 S.fasciculata, Torr. & Gray. .Ss. anomala, var. Mexicann, Moricand, which appears 

 to be likewise S. muricata, Cav. Ic. vi. 78, t. 597. Malvastrum linear if olium, 

 Buckley, Proc. Acad. Philad. 1861, 449, is the same. 



2. Species with flowers not involucrate, either solitary or clustered in most 

 of the axils, or barely paniculate at the summit : calyx 5-angled, and petals 

 mostly yellow. 



* Stems diffusely decumbent or prostrate and filiform: petioles and peduncles 

 long and slender : leaves somewhat cordate, small. 



S. DIFFUSA, HBK., with hardly a doubt, although the flowers are not "vio- 

 let," nor tlie fruit depressed at summit. S.Jiliformis, Moricand, and S.Jilicaulis, 

 Torr. & Gray. Texan, Arizonian, and Mexican. 



S. SDPiNA, L'Her. W. Indian and on the Florida Keys. 



