8 BOTANY 
CALYPrRIDIUM MONANDRUM, Nutt. in Torr. & Gray, Fl. 1, p. 198. Camp 62; Long valley; 
March 26. Accords throughout with Nuttall’s character of the plant. Calindrinia monandra 
DC. is not a congener of it. 
SEsuVIUM PORTULACCASTRUM, Linn.; var. sESSILE. Explorer’s Pass; Lower Colorado; Janu- 
ary 13. 
LEwIsta REDIVIVA, Pursh, Torr. & Gray, Flor. 1, p. 677. Partridge creek; April 24. 
Flowers white, veined with pink, beautiful. 
MALVACEA. 
MALVASTRUM EXILE, (sp. noy.;) stellato-puberulum, viride; caulibus e radice annua diffusis, 
2-6-pollicaribus, lateralibus inferne nudis ; foliis rotundatis 5-lobis semipollicaribus, lobis obtu- 
sissimis parce crenato-incisis ; floribus axillaribus parvis bibracteolatis ; sepalis lanceolato-sub- 
ulatis corollam albam subequantibus; carpellis muticis reniformi-circinatis evalvibus dorso 
transversim grosse rugosis ad ventrem tenuem demum ruptis. 
On sandy surfaces of the Colorado desert, near the river; Pyramid cafion; March 15. A small 
inconspicuous but well-marked species ; a winter annual, flowering from the crown or the axils 
of the subradical ‘leaves, and also along the upper part of the ascending stems or branches ; 
the earlier peduncles about an inch long in fruit, the upper ones much shorter. Bractlets 
linear setaceous, opposite, just below the flower. Calyx deeply 5 parted. Corolla ‘‘ white,’’ 
about 3 lines long. Anthers not very numerous, ona short column. Styles about 12 or 15; 
stigmas capitate. Carpels in fruit of a cellular chartaceous texture; glabrous, rugose on the 
back with 10 or 12 salient and narrow transverse lines or ridges, not dehiscent, but the more 
delicate and fragile ventral portion gives sie for the escape of the seed. The seed is that of 
the genus, the radicle inferior. 
Matvastrum Monroanum, Gray, Pl. Fendl., p. 21. 
Malva Monroana, Dougl. in Bot. Reg., t. 1306. 
M. fasciculata, Nutt. in Torr. & Gray, Flor. 1, p. 225. 
Malvastrum Thurberi, Gray, Pl. Thurb. 
M. Marrubioides, Durand, Pl. Heerm. Sitgreaves’s Pass ; March 24. 
Sipa HEDERACEA, Torr. in Pl. Fendt. l.c. Fort Yuma to Big Cafion; January to March. 
Spu#raLcea Emoryl, Torr. 1. c., Gray, Pl. Wright. 1, p. 21. Big Cafion of the Colorado ; 
March 7. 
SpHHERALCEA INCANA, Torr. l. c., Purple Hills; January 15. 
Also var. oBLoNGIFOLIA, Gray, Pl. Wright. Riverside mountain ; February 28. 
LINACE. 
LinuM PERENNE, Linn.; Torr. & Gray, Flor. 1, p. 204. Common on the Colorado and on 
the table-lands of New io 
_ Linum aristatum, Englm. in Mem. Wisl. & Pl. Wright. 1, p. 25. Sand hills of the Colorado ; ; 
May 4, just coming into flower. Covero, May 29. 
GERANIACE A. 
“Exon crcuTaRium, L’ Herit. Sitgreaves’s Pass; March 24. Very abundant over all the 
a Biers. The name is not very appropriate ; and the species must include E. 
y, Gen. Hl. t. 150. 
