POLYGONACEJ. 445 



Plate 14, A. Eriogonum acetoselloides : an entire plant of the 

 natural size. Fig. 1. Involucre and bracts. 2. A separate flower, 

 with its pedicel and a single bracteole. 3. Portion of a pedicel with 

 two bracteoles. 4. A stamen, front view. 5. Back view of the same. 

 6. An exterior division of the perianth. 7. An inner division of the 

 perianth, with three stamens attached to its base. 8. Ovary. 9. Ache- 

 nium. 10. Seed. 11 and 12. Embryos; the latter from a perfectly 

 mature seed. 



14. Eeiogonum vimineum, Dough in Benth. 



Hab. Kooskooskee River, Washington Territory, and Rogue River, 

 Northern Oregon; also, the var. eriodadon, Benth., Lower Sacra- 

 mento, California. 



15. Eriogonum confertiflorum, Benth. in DC. 



Hab. Shasta River, in Northern California, and on the Walla- 

 Walla, in Oregon. 



2. CHORIZANTHE, Benth. 



1. ClIORIZANTHE ANGUSTIFOLIA, Nutt. 



Chorizanthe angustifolia, Nutt. PI. Gamb. in Jour. Acad. Philad. n. ser. 1, p. 167; 

 Benth. in DC. Prodr. 14, p. 26. 



Hab. Near San Francisco, California. — Stem diffusely branched. 

 Involucre unequally 6-toothed, the teeth subulate, the 3 exterior 

 much longer than the 3 inner ones. Lobes of the perianth oblong, 

 emarginate, mucronate. Achenium oblong, glabrous. Seed con- 

 formed to the pericarp, nearly terete. Embryo straight, the cotyle- 

 dons narrowly oblong. [A depauperate state of G. pungens, Benth.] 



112 



