366 COMPOSITE. Hemizonia. 



to 20 : chaff of receptacle more or less distinct, truncate : ray-akenes as in the pre- 

 ceding : pappus of those of the disk short and awnless ; the scales 7 to 10, oblong, 

 ineisely or fimbriately toothed, very much shorter than the akene, rarely wanting. 

 — Calycadenia truncata, DC. 



Dry ground, Valley of the Sacramento to Mendocino Co. , &c. 



-s- -f- +- Setose-hirsute or hispid, at least on the margin of the leaves or bracts : heads 

 sessile or nearly so, and often clustered in the axils and at the summit of the stem : 

 short-stipitate or almost sessile saucer-shaped glands at the tips of the upper and 

 fascicled leaves, bracts, &c, and often on their sides. 



17. H. Douglasii, Gray. Slender, a span to a foot or so high, more or less 

 hirsute or hispid with white bristly hairs, especially on the margins towards the 

 base of the almost filiform leaves : heads solitary in the axils : " flowers yellow " : 

 pappus of 10 subulate awn-pointed chaffy scales, or some of them shorter and 

 truncate or obtuse. — Calycadenia villosa, DC. 



Open grounds, in the western part of the State, Valley of the Sacramento, &c. Collected in 

 "Long Valley" by Dr. Kellogg, who notes that the "flowers are yellow," probably pale. Glands 

 few or sometimes none except the terminal ones. Rays 3 or 4 ; disk-flowers 5 to 10. Except in 

 the slenderness, the scattered solitary heads, and, if constant, the "yellow" flowers, it is diffi- 

 cult to distinguish this from forms of the next. The specific name, villosa, which is hardly ever 

 appropriate even in Calycadenia, may give way in the transference to Hemizonia. 



18. H. multiglandulosa, Gray. A span to 2 feet high, more or less hirsute and 

 hispid, especially towards the base of the almost filiform leaves : stipitate glands mostly 

 present and often copious on the upper leaves, bracts, involucral scales and united 

 chaff : heads solitary or clustered in the axils, and commonly capitately or spicately 

 crowded at the summit of the stem : flowers white, sometimes tinged with rose- 

 color : pappus of 10 or 12 chaffy scales, either all or about half of them subulate- 

 acuminate or awn-pointed, the others short and pointless. — Calycadenia multiglan- 

 dulosa & C. cephalotes, DC. ; Torr. & Gray : the former a state with scattered heads 

 and very copious tack-shaped glands ; the latter with heads all or most of them 

 capitate-crowded at the summit. 



Open dry grounds ; common through the western part of the State. No reliance can be 

 placed upon the abundance or rarity of the glands, the crowded or more scattered heads, nor the 

 pubescence of the akenes, in this and the preceding species. The ray-ovaries are rarely quite 

 glabrous, commonly a little hairy at top, or sparsely so throughout. The scales of the pappus 

 are sometimes all alike and subulate or awn-pointed, or some of them so ; but usually the alter- 

 nate ones are short and blunt. These charactei-s are so mingled that varieties cannot well be 

 defined, at least with the present materials. 



§ 4. Akenes nearly as in § 3, but more nearly equal-sided, acutely 1 0-nerved or ribbed, 

 all more or less hirsute and with depressed terminal areola, this bearing a 

 coroniform pappus in the ray, and a pappus of about 20 equal plumose awns 

 in the disk-alcenes, only the central ones of the latter sterile. — Blepharizonia, 

 Gray. 



19. H. plumosa, Gray. Two or three feet high, with the heads racemose- 

 paniculate along the virgate branches, somewhat setose-hispid and with fine rather 

 viscid pubescence : cauline leaves unknown ; those of the flowering branches all 

 short and bract-like, oblong, tipped and often sparsely beset (as are the similar 

 scales of the involucre and the outer chaff of the receptacle) with short-stipitate and 

 pale saucer-shaped glands : corollas " yellow " or more probably white ; those of the 

 ray 7 to 10, deeply and irregularly 3-lobed, of the disk 10 to 12. — Proc. Am. 

 Acad. ix. 192. Calycadenia plumosa, Kellogg in Proc. Calif. Acad. v. 49. 



Valley of the Sacramento. Sent from Stockton to Dr. Kellogg by an unknown collector. 

 Heads rather broad, 3 lines high, exclusive of the rays ; these with their short tube about 4 

 lines long. Receptacle flat or nearly so, pubescent ; its chaff of distinct scales in about two 

 series, the inner smaller. Ray-akenes fully a line and a half long, turbinate, with a more con- 

 tracted base, and a rounded summit having a rather small and not protuberant areola, bearing a 



