OF ARTS AND SCIENCES. 



131 



ZoSTERA Okkg.vxa. Stem slender: leaves H to 2 lines broad, 

 rather faintly o-uerved : spathes 2 or 3 inches long, very obtnse, wIlIi 

 a short scarious crest but without a foliar appendage at the sumuiit ; 

 spadix short-acuminate : utricle with a long straight beak ; seed (im- 

 mature) narrowly oblong, with IG longitudinal striie. — Collected by 

 Elihu Hall in 1871, probably near the moutli of the Columbia River, 

 Oregon ; in Herb. Gray, without number, and not mentioned in the 

 I)ublished list of his distributed Oregon collection. Readily distin- 

 guished by the uuappendaged spathe. The spadix examined was 

 about 15-lruited; the anthers had all fallen. 



Zostera Pacifica. Stem stout ; cauline leaves 4 to G lines 

 broad, 5-y-nerved, those on the branches 2 lines broad and 3-nerved : 

 spathe nearly 3 inches long, with a long foliar appendage ; spadix 

 acutish, many-flowered : utricle with a long straight beak ; seed 

 broadly elliptical, compressed, 1^ lines long, not evidently striate but 

 appearing under the microscope very finely transversely striolate. — 

 About Puget Sound (Rev. R. D. Nevius) ; Monterey {Dr. G. L. An- 

 derson) ; Santa Barbara {Mrs. R. F. Bingham). A specimen received 

 from Mr. Nevius is eight feet long, with some of the leaves four feet 

 in length. The anthers are mostly arranged in vertical pairs, alter- 

 nating with solitary ovaries. The seed is remarkably distinct from 

 that of Z. marina, which is shorter, oblong, terete, and conspicuously 

 20-striate. The species has been described by Mr. Morong (Torr. 

 Bull. 13. 160) as Z. marina, var. (?) latifoUa. 



2. Descriptions of nciu Mexican Species, collected cliicfiy Vy 

 Mr. C. G. Prinrjk in 1889 and 1890. 



Ranunculus vagans. Near R. hydrocharoides and R. stoloniftr, 

 low, spreading by elongated stolons, glabrous : leaves narrowly lanceo- 

 late or the lowermost ovate-lanceolate, entire or with a few often slen- 

 der teeth toward the apex: petals 8 to 10, oblong-obovate, about 2|- 

 lines long and nearly twice the length of the sepals, with a prominent 

 gland above the narrow claw: carpels smooth, in a dense globose 

 head 1\ lines in diameter. — Found iu shallow ponds near Flor de 

 Maria in the State of Mexico, August, 1890 (n. 3177). 



Nasturtium bracteatum. Annual, erect, unbranohed, glabrous 

 or slightly and finely pubescent (G inches high or less) : leaves sessile, 

 auricled at base, narrowly oblong, pinnately toothed, 6 to 9 lines long: 

 raceme many-fiowered and becoming elongated ; fruiting pedicels di- 

 varicately spreading, 3 lines long, the lower solitary in the axils of the 



