22 POLYGONACE^E. Eriogonum. 



= ==== Peduncle leafy-bracteate in the middle, bearing a solitary involucre. 



13. E. Kelloggii, Gray. Low and very slender, villous tomentose : leaves ob- 

 lanceolate, 2 to -1 lines long, scarcely petiolate : peduncles 2 to 4 inches high, with 

 a central whorl of 3 to 5 foliaceous bracts and bearing a single naked rather large 

 strongly-toothed involucre (2 lines long) : flowers rose-colored or whitish, 1- to 2| 

 lines long. Proc. Am. Acad. viii. 293. 



In fir- woods on Red Mountain, Mendocino County, Kellogg & Harford. 



* * Involucres unequally k-lobed, mostly small, pedicellate in di- or trichotomous 

 cymes or panicles (or sometimes sessile in the forks) : perianth not long-atten- 

 uate at base. Mostly leafy annuals : filaments and ovary glabrous. 

 ( FOLIOSA, Eenth.) 



14. E. spergulinum, Gray. Very slender, 3 inches to 2 feet high, diffusely 

 branched usually from the base, slightly glandular-hispid or nearly glabrous : lower 

 leaves scattered near the base, thin, linear- oblanceolate, | to 2 inches long, more 

 or less hirsute, the margin somewhat revolute ; bracts similar : pedicels very slen- 

 der, 3 to 6 lines long, spreading : involucres turbinate, ^ line long, deeply 4-cleft, 

 glabrous, 1 - 2-flowered : bractlets none : flowers exserted, rose-colored, | to 1 line 

 long, slightly glandular-puberulent at base ; segments cuneate- oblong, the outer 

 obtuse or retuse, the inner erosely 3-toothed : akene obovoid or lenticular. Proc. 

 Am. Acad. vii. 389 ; Torr. & Gray, 1. c. 189. 



In the Sierra Nevada at 6, 000 to 10,000 feet altitude, frequent, from Sierra County (Lcmmwi) to 

 Tulare County, Rothrock. 



15. E. hirtiflomm, Gray. Diffusely branched, 6 inches high or less, somewhat 

 glaudular-puberulent and viscid : bracts hispid, oblong, 3 lines long or less, acutish : 

 involucres turbinate, half a line long or less, 4-parted, on slender erect or nodding 

 pedicels 1 to 3 lines long, or in the forks often nearly sessile : flowers 3 to 5, very 

 hirsute, yellowish tinged with red, \ line long ; segments oblong, obtuse : akene 

 triangular, exserted. Watson, Proc. Am. Acad. xii. 259. 



Collected by Dr. Gray, in 1872, and by Hooker & Gray in 1877, in Tuolumne County, at 

 2,500 to 5,000 feet altitude. 



E. PHARNACEOIDES, Torrey in Sitgreaves, Rep. 167, t. 11. Tall and hoary- toinentose, leafy 

 and rather sparingly branched : leaves linear-oblanceolate, smoother above, with revolute margin, 

 an inch long or more : involucres on elongated pedicels, turbinate, deeply 6-8-cleft, 1 to 1 lines 

 long, 8 - 1 2-flowered : flowers glabrous, whitish, aline long ; outer segments ovate, at length 

 bigibbous at base, the inner linear-oblong, retuse. Fort Whipple, Arizona (Palmer), and east- 

 ward to New Mexico. 



E. ABERTIANUM, Torrey, and E. VILLIFLORUM, Gray, may also perhaps be found on the south- 

 eastern borders of the State, both villous species with deeply cleft involucres. The first an erect 

 branching annual, with ovate or subcordate leaves, the upper lanceolate or linear ; involucres 

 4-8-cleft, 1^ lines long, scattered along the branches; flowers rose-colored, glabrous, the outer 

 segments round-cordate, becoming 2 lines long, the inner linear-oblong : E. Arizona and New- 

 Mexico. The second is a dwarf cespitose perennial, with small oblanceolate leaves crowded on the 

 very short branches of the thick caudex, and each branch terminated by a slender peduncle (an 

 inch long) bearing a loose cymose head ; involucres 6-cleft, 2 lines long : flowers silky within and 

 without, a line long, 6-cleft to the middle ; the lobes oblong and nearly equal : S. Utah, Siler, 

 Parry. 



2. Involucres mostly campanulate or short-turbinate, small, not angled and 



rarely obscurely nerved, with 5 rounded erect often membranously mar- 

 gined teeth, pedicellate in diffuse repeatedly di- or trichotomoiis cymose 

 umbels or panicles, usually more or less defiexed or spreading : bracts ter- 

 nate, not foliaceous, small and mostly triangular and rigid : perianth not 

 attenuate at base. Slender annuals (the Californian species), with radical 

 and rounded leases : inflorescence and involucres usually glabrous : fila- 

 ments and ovaries glabrous. GANYSMA, Watson. 



