ADDITIONS AND CORRECTIONS TO VOL. II. 43]^ 



35. E. parvifolium, Smith. Los Angeles, Mrs. A. E. Bush. 



36. E. fasciculatum, Benth. So connnon in some portions of Southern Cali- 

 fornia as to bo known as "Bee-feed" or "Wild Buckwheat." 



Page 33. 7. CHORIZANTHE. 



Bentluun & Hooker (Hen. PI. iii. 93) still n-tain the genus Ccntrostcgia as distinct from Chori- 

 zanthr, cliaracteriziug it by the 2- 4-llo\vere(l 3-G-toot!ie(l divnricately simrred involucre, typical 

 ChorJzant/ic having a (Moothcd spurlcss involucre and (lowers always solitary. Both section". 

 Miicronca and Aatnlhoijnuuin, however, as recognized by them, deviate as much or more in tlu 

 number of involucral teeth. A Chilian species of true Chorizanthe {C. commi.fsurnlis, Gay), repre- 

 .scnted in herb. Gray by specimens from Gay, has the involucre conspicuously and nearly or quite 

 constantly spurred at base with divaricate spines, and a gibbous dilation at base is not rare in our 

 own species. The only remaining character is invalidated by the fact that of the two species of 

 Chorizmithc only one has with ajiparent uniformity more than one flower (2 or 3), while the other 

 has rarely more than one. Considering the accepted heterogeneous character of the genus Chmi- 

 za-nthc it seems more reasonable and .satisfactory to unite Ccntrostcyia also with it, than to rest it 

 upon characters none of which are constantly distinctive. 



Insert in Key to Species, after 17. C. Pauiiyi : — 



I>eaves narrowly nblanceolate, not tomentose : awns of involucre 



straight: corolla-lobes nearly equal, broadly oblong. 17». C. Feknandina. 



Like n. 20 : bracts long-spinose : awns of involucre straight : 

 corolla white, lobes round-obovate, unequal. 20*. C. spinosa. 



6. C. stellulata, Benth. Hillsides, Butte County, Mrs. Austin. 



8. C. diffusa, Benth. San Luis Obispo {Lemmon) ; Santa Barbara, Mrs. E. 



Cooper. 



10. C. pungens, Benth. Near San Bernardino, Lemmnn. 



17". C. Fernandina. Procunibent, rather stout, slightly silky pubescent : leaves 

 narrowly obhuuieolate, not tomentt>se : lower bracts foliacoous, the up])er narrowly 

 linear: tube of involucre a line long, the rather stout teeth with straight awns: 

 flowers white, a line long ; lobes nearly erjual, broadly oblong, the alternate ones 

 slightly narrower. 



San Fcniandino Canon, Los Angeles County, Mrs. A. E. Bush. This species and C. spinosa 

 dilfer from tin; rest of the subsection in the straight awns of the involucre. 



18. C. Xanti, Watson. Near Grafton, Southern California, Lemmon. 



20". C. spinosa. Resembling C. vniaristata : bracts more rigid, lanceolate, 

 attenuatn to a long spine : involucral segments nneqiml, one or two often much the 

 larger, all with straight spines : flowers white ; lobes round-obovate, entire, the 

 alternate ones a half smaller. 



Near San Bernardino, Lemmon. 



21. C. brevicornu, Torr. Camp Independence, Inyo County, Matlheics. 



2.5. C. Watsoni, Torr. <^' Gray. Camp Independence {Matthews); Union 

 County, Oregon, W. C. Cusick. 



Page 39. 9. HOLLISTERIA, Watson. 



Involucre unilateral, of 3 equal .slightly united herbaceous linear blunt bracts, 

 2-nowcre(l, solitary and sessile in the axils. Perianth turbinate, membranous, G-cleft 

 to the middle. Stamens 9, on the throat, included. Styles slender. Akeno gla- 

 brous, ovate, triangular above. End)ryo curved, the orbicular cotyledons accum- 

 bent to the slender radicle. — A small fragile diffusely branched leafy annual, white- 

 woolly throughout ; leaves all foliaceous, cuspidate, apparently alternate with a very 



