CALIFORNIA ACADEMY OF SCIENCES. 279 



tributed as 31. Shortii by Sir William Hooker in 1835, are 

 but young plants of Plantago pusilla, Nutt! 



2. The Genus Blejpharizoma. 



Hemizonia, as at present defined in all our valuable trea- 

 tises on the Composite, appears to the writer to be very 

 ungenerically polymorphous. One proposal in the way of 

 reducing its unwieldiness was some time ago decided upon, 

 and is here presented, namely: 



BLEPHARIZONIA, Nov. Gen. Madiearum. 



Ray flowers 7 — 10, with 3-lobed, white ligules: disk-flow- 

 ers 10 — 30; outer ones subtended by linear receptacular 

 bracts: akenes sericem-hirsute, 10-nerved, those of the disk 

 bearing a pappus of many densely plumose awns. — Hemizo- 

 nia § Blepharizonia, Gray, Proc. Am. Acad. ix. 192; Bot. Cal. 

 i. 366, & Syn. Fl. i., Part ii. 312. Stout, coarse, glandular- 

 viscid and heavy-scented, hirsute annuals, apparently con- 

 fined to the lower part of the valley of the San Joaquin. 



B. plumosa. One to three feet high, branching from the 

 base: heads racemosely paniculate, 15 — 20-flowered: ray- 

 akenes with a minute crown of very short scales; those of 

 the disk bearing a pappus of twenty or more erect, plumose 

 bristles half the length of the body of the akene. Calycad- 

 enia plumosa, Kellogg, Proc. Cal. Acad. v. 49; Hemizonia, 

 plumosa, Gray, Bot. Cal. i. 366, & Syn. Fl. 1. c. excl. var. 

 subplumosa. 



B. laxa. Three to six feet high, paniculately branching 

 above: heads solitary at the ends of the branches, 20 — 35- 

 flowered: pappus of ray- and disk-akenes alike, short and 

 coroniform-spreading in both, less plumose than in the pre- 

 ceding, never, in those of the disk even, more than a fifth 

 the length of the body of the akene. — Hemizonia plumosa, 

 var. subplumosa, Gray, Syn. Fl. 1. c. 



