312 COMPOSITE. Hemizonia. 



by the same at Milton. Desiccated plains, from Lake Co. to Merced Co., California; first 

 coll. by Dour/las, in immature aud depauperate specimens. As polymorphous as the next 

 species. 



H. multiglandulosa, GRAY, 1 c. Hirsute or hispid, also puberulent : tack-shaped glands 

 usuallv abundant on the back of the bracts of the involucre aud of the receptacle: flowers 

 white, soinetimes purplish-tinged : ray-akenes glabrous or glabrate, short and broadly ob- 

 pyramidal-obovate, glabrous or soon glabrate : pappus much shorter than the disk-corolla 

 and shorter than the akenes, of 10 or rarely 12 unequal palere, 5 of them oblong- to lanceolate- 

 subulate and attenuate at summit into an awn-like point, the others obtuse or erose-trun- 

 cate. Cd/i/cadenia multiglandulosa & C. ccj>lialntes. DC. 1'rodr. v. 695. Common in Cali- 

 fornia, especially in the Great Valley and north of the Bay of San Francisco. Runs into 

 many and various forms. The type of the species has the heads or clusters sessile and not 

 much crowded in the axils of the leaves along the virgate stem or its basal branches : odor 

 said to be disagreeable. 



Var. ceplialotes. Stouter, with heads densely glomerate at the summit of the stem 

 and in approximate axils, sometimes appearing later in remoter axils : herbage heavy-scented. 

 //. cc./i/ialotes, Greene in Bull. Torr. Club, ix. 110. Calycadenia cephalotes, DC. I.e. A 

 common form : odor said to be balsamic. 



Var. sparsa. Slender, lax, a span to a foot high : lower and sometimes all the leaves 

 opposite : heads usually solitary in a few axils ; the terminal glands on the bracts few. 

 H. Fremont i, Gray, Proc. Am. Acad. ix. 191. (Cali/cadenia Fre.monti, Gray, Bot. Mex. 

 Bound. 100.) //. oppositifolia, Greene, Bull. Torr. Club, 1. c. Valley of the Sacramento, 

 Fremont, Mrs. Bidwell, Parry, c. 



4. BLEPHAKIZONIA, Gray. Ray-flowers 7 to 10, with 3-lobed ligules : disk- 

 flowers 10 to 20; outer ones subtended by one or two series of linear receptacu- 

 lar bracts : akenes of disk disposed to be fertile and nearly like those of the ray, 

 except in their pappus of about 20 short and stout densely plumose awns : ray- 

 akenes elongated-turbinate, hardly oblique, sericeous-hirsute, about 10-nerved, witli 

 broad and depressed terminal areola, this obscurely coroniform-bordered. Proc. 

 Am. Acad. ix. 192, & Bot. Calif, i. 366. 



H. plumosa, GRAY, 1. c. Strongly ill-scented annual, 2 to 5 feet high, pauiculately 

 branched, hirsute-pubescent, above most copiously beset with very viscid tack-shaped 

 glands: cauliue leaves linear, entire ; those of the bnui'-hlf-ts verv small, oblong or oval, 

 bract-like: heads racemosely paniculate, broad i'4 or !> iin long): involucral bracts short, 

 very glandular: pappus in the original sperinii'ii- nearly liui,' the length of the disk- 

 akeues. Calycadenia plumosa, Kellogff. I'roc. Cali'". Acad. v. 49. Banks and dried beds 

 of streams, near Stockton, California; the original ui~covcrer unknown; recently collected 

 by Lrmmon, &c. 



Var. SUbplumosa. Pappus only one quarter the length of the clisk-akenes, or even 

 hardly longer than the diameter of their summit : heads more sparse, terminating loosely 

 paniculate branches. Near Stockton, apparently same habitat as that of the original 

 species, Parry, Mrs. Curran. 



125. ACHYRACHJilNA, Schauer. ("A^pov, chaff, and achanium, the 



botanical name of the fruit of Compositae, &c. : relates to the very chaffy pappus.) 



-Del. Sem. Hort. Vratisl. 1837; DC. Prodr. vii. 292; Torr. & Gray, Fl. ii. 



392 ; Benth. & Hook. Gen. ii. 396. Lepidostephanus, Bartl. Ind. Sern. Hort. 



Gcett. 1837. Single species, a Californian annual. 



A. mollis, SCHAUER, 1. c. A span to a foot high, erect, villous-pubescent, slightly glandular- 

 viscid : leaves alternate, or the lower opposite, long and narrowly linear, entire or the lower 

 laciniate : heads solitary and long-pednneled, terminating the stem and fastigiate branches, 

 an inch or less long : corollas whitish or yellowish and turning brownish : pappus and disk- 

 akenes each quarter-inch long: in fruit and when mature and dry the iikenes with their 

 spreading pappus diverging, forming a globular silvery-chaffy head, resembling that of Thrift 



