ADDITIONS AND CORRECTIONS TO VOL. II. 



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



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

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



Page 33. 7. CHORIZANTHE. 



Bentham & Hooker (Gen. PI. iii. 93) still retain the genus Ccntrostegia as distinct from Chori- 

 zantlic, characterizing it by the 2 - 4-flo\vered 3-6-toothed divaricately spurred involucre, typical 

 Chorizantlie having a 6-toothed spurless involucre and flowers always solitary. Both sections 

 Mucranea and Acanthogonum, however, as recognized by them, deviate as much or more in the 

 number of involucnil teeth. A Chilian species of true Chorizantlie (C. commissuralis, Gay), repre- 

 sented 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 

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

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

 zanthc it seems more reasonable and satisfactory to unite Ccntrostegia also with it, than to rest it 

 upon characters none of which are. constantly distinctive. 



Insert in Key to Species, after 17. C. PAKRYI : 



Leaves narrowly oblanceolate, not tomentose : awns of involucre 



straight : corolla-lobes nearly equal, broadly oblong. 17". C. FERNANDINA. 



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, Lemmon. 



17 a . C. Fernandina. Procumbent, rather stout, slightly silky pubescent : leaves 

 narrowly oblanceolate, not tomentose : lower bracts foliaceous, the upper narrowly 

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

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

 slightly narrower. 



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

 differ from the rest of the subsection in the straight awns of the involucre. 



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



20 a . C. spinosa. Eesembling C. uniaristata : bracts more rigid, lanceolate, 

 attenuate to a long spine : involucral segments unequal, 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, Matthews. 



25. C. Watsoni, Torr. & Gray. Camp Independence (Matthews); Union 

 County, Oregon, W. C. CusicTc. 



Page 39. 9. HOLLISTERIA, Watson. 



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

 2-flowered, solitary and sessile in the axils. Perianth turbinate, membranous, 6-cleft 

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

 brous, ovate, triangular above. Embryo 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 



