192 PROCEEDINGS OF THE AMERICAN ACADEMY 



haps all become fertile; and the plumose disk-papptis is very like that 

 of Blepliaripappus, a slender form of which in the Kew herbarium 

 was in the Genera Plantarum mistaken for a Hemizonia. Moreover, 



is a handsome species, with its copious bright white flowers displayed towards 

 sunset and through tlie early morning; and is well worthy of cultivation. 



•1- •<- Glaberrima, foliis infimis tantum setoso-hispidulis, capitulis dissitis soli- 

 tariis ; pajjpi paleis brevibus muticis, raro nullis. 



15. H. TRUNCATA. Calycadeiiia tnmcata, DC. 



-t- -1- -1- Setoso-hirsuta rel hispida, prjesertira ad margines foliorum et bracte- 

 arum, capitulis in axillis sessilibus solitaris vel glomeratis, pappi paleis aut 

 fere omnibus aut alternis aristato-subulatis. 



16. H. DouGLASii. Calycadenia villosa DC. — Flores ut dicitur lutei : capi- 

 tula in axillis solitaria, sEepius dissita. — In transferring this, I venture to change 

 the specific name. It is seldom if ever villous, and usually hardly at all hirsute. 

 Unless the color of the flowers may be relied on, it will be difficult to distinguish 

 the species from slender forms of the following. 



17. H. MDLTiGLAXDULOSA. Colycadenki multiijlandulosa & C cephahtes DC — 

 Flores albi, quandoque carnei'? Capitula saltern superiora ssepius glomerata, 

 nunc spicato-conferta. 



§ 4. Blephaeizonia. Achenia omnia turbinata fere sequilatera, hirsuta, acute 

 10-costata, areola epigyna majuscula centrali baud prominula, intima disci 

 tantum sterilia, omnia pappifera ! Pappus fl. disci ex aristis circiter 20 

 sequalibus barbato-plumosis, radii e coronula paterseformi subscariosa mar- 

 gine ciliata constans ! Caet. fere Calycadenioe. 



18. H. PLUMOSA. Calycadenia plumosa Kellogg, in Proc. Calif. Acad. 5, p. 49. 

 — Near Stockton, California, sent by an unknown collector to Dr. Kellogg, from 

 whom I have a branch. An anomalous species, which it is wonderful should 

 have been overlooked, if it really grows in a district so often traversed by bota- 

 nists as the neighborhood of Stockton. It has three remarkable peculiarities, — 

 1. The 10-ribbed or acutely lO-uerved achenia ; 2. A distinct coroniform pappus 

 to the ray-achenia, in which it departs from the character of the subtribe, but 

 something like it is occasionally seen in Layia; 3. The pappus of the disk- 

 akenes (most of them fertile) consists of plumose awns instead of naked palese, 

 in this respect approaching Blepliaripappus; but the style-branches, &c., are as 

 in Calycadenia. Dr. Kellogg describes the flowers as yellow, but they may have 

 been white. The CalycadeniaASke glands are copious and light-colored. Chaff 

 of the receptacle not forming a cup, as described by Dr. Kellogg, but of distinct 

 scales, occupying more than one series. Moreover, the achenia are not " obcom- 

 pressed," nor is it clear what is meant by their being " imbedded in the densely 

 villous disk." 



E.rcludendce. H. ? ciliata Torr. & Gray {Hartmannia ciliata DC.) is Oxyura 

 chrysanthemoides DC. = Layia chrysanthcmoides Gray. — H-JiUpes Hook. & Am. is 

 Lagophylla filipes Gray. — " H. sp. coll. Bridges, no. 118," Benth. & Hook. Gen. 

 1. c. = Blepliaripappus scaler, Hook. var. 



