OP ARTS AND SCIENCES. 295 



Avicularia. All the species are low slender erect and branching 

 annuals. — P. Californicum, Meisn., is somewhat taller, with longer 

 naiTower and looser spikes, short sheathing deeply lacerate stipules, 

 shorter bracts scarcely equalling the slightly larger flowers, and a 

 longer akene with but slightly divergent styles. 



Polygonum (Duravia) Greenei. Resembling P. Calif omicum, 

 with denser spikes, the bracts and wholly fimbriate stipules 2 lines 

 long : styles very short, somewhat spreading. — Plains of Shasta, 

 Rev. E. L. Greene, 1876 ; near Chico, Mrs. J. Bidwell, July, 1878. 



Polygonum (Persicaria) Muhlenbergii. Perennial, in muddy 

 or dry jriaces, often 2 or 3 feet high, scabrous with short appressed or 

 glandular hairs, especially upon the leaves and upper stem : leaves 

 thin, rather broadly lanceolate, long-acuminate, usually rounded or 

 cordate at base, 4 to 7 inches long, on short stout petioles (\ to 1 inch 

 long) from near the base of the naked sheath : flowers and fruit nearly 

 as in P. amphibium, but spikes more elongated (1 to 3 inches long), 

 often in pairs. — New England to Texas and westward to Washington 

 Territory and N. California. P. amphibium, var. (?) Muhlenbergii, 

 Meisn. in DC. Prodr. 14, 116, and including most of the var. terrestre 

 of American botanists. Our subterrestrial form of P. amphibium 

 seems rarely if ever to correspond to the var. terrestre of Europe. 



Eriogonum (Eueriogonum § Foliosa) puberulum. A low 

 annual, dichotomously branching from near the base, appressed silky- 

 puberulent throughout : leaves all radical, obovate, 3 or 4 lines broad : 

 bracts foliaceous, mostly ternate, narrowly oblong, 2 lines long or less : 

 involucres sessile in the forks, very small, 4-parted : flowers few, 

 glabrous, rose-colored, about f of a line long : sepals oblong. — On 

 Red Creek, S. Utah; Dr. E. Palmer (n. 429, 1877). 



Eriogonum (Ganysma § Pedunculata) Hookeri. Glabrous, 

 a foot high or more ; stem slender, not branching near the base as do 

 the rest of the group : leaves densely floccose-tomentose both sides, 

 orbicular: involucres campanulate, sessile or nearly so, reflexed and 

 secund upon the branches : flowers pale yellow, the outer sepals 

 subreniform-cordate, a line long ; the inner oblong-ovate, half as long: 

 akene abruptly beaked, \ line long. — Wahsatch Mountains, American 

 Fork Canon (n. 1033 Watson, at least in part) ; W. Nevada, Hooker 

 & Gray, 1877. Referred in King's Rep. 5. 306 to E. deflexum, which 

 branches from the base, has more turbinate involucres, smaller flowers 

 with narrower rose-colored sepals, and a more attenuate akene. 



Eriogonum insigne. Of the same group : becoming very stout 

 and 2 or 3 feet high, glabrous excepting the reniform-cordate densely 



