Enogonum. ^OLYGONACE^E. 25 



oblong-ovate, 3 to 1 2 lines long : bracts very small, smooth or ciliate : involucres 

 minute (a third of a line long or less), turbinate-campanulate, glabrous, on very 

 slender divaricately spreading pedicels 3 to 6 lines long : flowers few, half a line 

 long, yellowish, pubescent; segments ovate-lanceolate, acute. Emory's Rep. 151 

 (as S, trichopes) ; Benth. 1. c. 20; Torr. & Gray, 1. c. 185. 



San Diego County, at Larken's Station near the southern boundary (Palmer) ; in the Colorado 

 Valley, at Fort Mohave (Coo^)cr), and eastward to S. Utah and New Mexico. 



26. E. inflatum, Torrey. Taller, 1| to 2 feet high, less branched but diffuse, 

 the stem and intemodes more elongated and usually more or less inflated, glabrous : 

 leaves rounded, to 1 inches long, usually cordate and mostly undulate : pedicels 

 6 to 12 lines long: involucres and flowers nearly as in the last, but the latter as 

 well as the akene larger, becoming over a line long. Fremont's Rep. 317 ; Benth. 

 1. c. ; Torr. & Gray, 1. c. 



Southern California, and in the dry valleys of Western Nevada and Arizona ; New Idria 

 (Brewer) ; Fort Mohave, Cooper. The other allied species, but with steins never inflated, are 



E. sunuEXiFOitME, Watson, Proc. Am. Acad. xii. 260. (E. reniformc, Torr. & Gray, 1. c. 184, 

 in part.) Sparingly villous at the nodes, the round-renifonn or -cordate leaves tomentose beneath 

 and silky villous above; involucres turbinate-campanulate, glabrous, half a line long, equalling 

 the glabrous or slightly hispid rose-colored flowers ; segments obloug. Arizona and S. Utah. 



E. GORDONI, Benth. 1. c. 20. Glabrous throughout or the petioles only slightly villous ; 

 flowers glabrous, light rose-colored, a line long, the outer segments ovate, the inner oblong ; 

 involucres as in the last. Colorado. 



E. GLANDULOSUM, Nutt. Beset with short stipitate glands ; leaves somewhat villous, obovate, 

 small ; involucres glabrous, turbinate-campanulate, half a line long ; flowers slightly hispid, 

 nearly a line long, the segments oblong-ovate, acutish. Probably in Colorado or New Mexico. 



E. SCALARE, Watson, Proc. Am. Acad. xii. 261. Slender and glabrous, the branches and 

 branchlets opposite or alternate (sometimes in threes), divaricate or ascending ; bracts distinct, 

 linear, acute, 1 or 2 lines long, spreading or reflexed, on the branchlets smaller and erect : pedi- 

 cels scattered on the branchlets, 1 or 2 lines long, ascending, filiform : involucres narrowly turbi- 

 nate, two thirds of a line long, glabrous ; bracteoles spatulate, naked : flowers slightly pubescent, 

 a line long ; segments oblong, the inner a little narrower. Canvas Point, coast of Lower Cali- 

 fornia (Streets) ; known only from imperfect specimens. 



* * Leaves commonly developed at the nodes, in the axils of ordinary triangular 

 bracts. ( PSEUDO-STIPULATA, Torr. & Gray.) 



27. E. angulosum, Benth. More or less floccose-tomentose, 3 to 15 inches 

 high, diffusely branching from near the base, the branches mostly 4 - 6-angled : 

 radical leaves orbicular to oblong-ovate, somewhat cordate or cuneate at base, obtuse 

 and often undulate, i to 1 inch long, on rather short petioles ; upper leaves oblong 

 to lanceolate or oblanceolate, sessile or nearly so : involucres on h'liform pedicels 3 

 to 15 lines long and mostly in the forks or terminal, hemispherical, a line or two 

 broad, many-flowered, smooth or minutely glandular : bractlets mostly firm and 

 dilated : flowers rose-colored or greenish, half a line long, nearly glabrous ; outer 

 segments ovate, concave, the inner longer, lanceolate. Linn. Trans, xvii. 406, 

 t. 18, f. 1 ; DC. Prodr. xiv. 22 ; Torr. & Gray, 1. c. 187. 



From the Lower Sacramento and Northern Nevada to Arizona and S. Utah ; frequent in dry 

 valleys and canons. 



3. Involucres cylindric-turbinate or prismatic, more or less strongly 5-Q-nerved 

 and with as many short erect teeth, often becoming cost ate or angled, rather 

 large (1 to 3 lines long}, sessile- (or rarely some of them pedunculate), in 

 heads or clusters or scattered in cymes or along virgate panicled branches, 

 always erect : bracts ternate, connate at base, usually short and acute and 

 more or less rigid, sometimes more or less foliaceous : perianth more abruptly 

 contracted to the base. Perennials, sometimes woody and leafy, with some 

 annuals or biennials, more or less white-tomentose : ovary and filaments 

 mostly glabrous. OUEGONIUM, Watson. 



