dondia CHENOPODIACEiE 599 



SALSOLA 



branaceous, free. Seeds compressed, vertical and with the radicle 

 inferior or horizontal : the testa smooth, black and crustaceous. 



D. diffusa Watson Proc Am Acad, ix, 88, under Suyeda. Glabrous or 

 more or less pubescent, green or often purple. Stem erect, 12-18 inches 

 high, diffusely branched with usually slender flexuoue elongated branches: 

 leaves subterete, 6-12 lines long, acute or acuminate, the floral ones similar 

 but shorter, usually rather distant on the branchlets; clusters 2-4-flowered : 

 calyx cleft to below the middle flashy, but carinate: seeds mostly vertical 

 half a line broad, perfectly smooth. Common on alkaline plains, southeas- 

 tern Oregon to Nevada and New Mexico. 



D. depressa Britton B. & B. Ill Fl. i. 585 Stueda depressa Watson. 

 Low and mostly decumbent, branching from the ba^e, smooth, the lowest 

 branches sometimes opposite: leaves linear, 3-12 lines long, broadest at 

 base, the floral ones oblong to ovate-lanceolate or ovate, acute, rather crow- 

 ded upon the branchlets : calyx cleft to the middle, one or more of the ac- 

 ute lobes very strongly carinate or crested : seed vertical or horizontal, % 

 line broad, very lightly reticulate. Idaho to Nevada, Colorado and the 

 Saskatchewan,* 



B. occidentalis Watson Proc Am. Acad, ix, 90 under Suaeda. "Erect 

 slender, 8-10 inches high, Fmooth, with elongated flexuous spreading 

 branches: leaves linear, %-\ inches long, acute, narrow at base, the floral 

 leaves somewhat widest : flowers few in the axils : calyx cleft nearly to the 

 middle, with obtuse lobes, at length surrounded by a transverse irregular 

 lobed veinless wing a line broad : seed horizontal, -^ line broad, obscurely 

 reticulated." Eastern Washington to Nevada. 



D. intermedia Watson Proc. Am. Acad, xiv, 296, under Suasda. 

 11 Perennial, the straight erect slender herbaceous stems from a short woody 

 bas^', 9-18 inches high, glabrous or sometimes puberulent : branchlets 

 also slender, ascending: leaves very narrowly linear, with a contracted base, 

 acute, 6-10 lines long, much shorter on the branches : fertile flowers very 

 small, often solitary the deeply cleft calyx unappendaged:seed very small 

 (^of a line broad), horizontal, not at all tuberculate under the microscope." 

 Eastern Oregon to Utah and Arizona. 



Tribe 6 Salsolese Moq. Annal. Sci. Nat. series 2, 209. Stems 

 not articulated. Leaves subterete. Flowers perfect. 2-bracted. 

 Sepals persistent. Seeds horizontal or vertical, with simple membra- 

 naceous testa. Embryo spiral. 



13 SALSOLA L. Sp. 222. 



Annual or perennial branched herbs with rigid subulate prickly- 

 pointed leaves and sessile perfect 2-bracteolate flowers solitary 

 in the axils, or sometimes several together. Calyx 5-parted, its 

 segments appendaged by a broad membranous horizontal wing in 

 fruit and enclosing the utricle Stamens 5. Ovary depressed : 

 styles 2. Utricle flattened. Seed horizontal. Embryo coiled into 

 a conic-spiral: albumen none. 



S. tragus L. Sp. ed. 2,322. Annual, Glabrous, loosely bushy-branch- 

 ed 1-2 feet high : leaves 3-10 lines long succulent, lanceolate-subulate the 

 midnerve excurrent into a stout yellowish-green prickle often bright red 

 at maturity : calyx membranaceous, conspicuously veiny, its wing longer 

 than the ascending lobe. In cultivated fields, eastern Oregon and Wash- 

 ington to the Atlantic States : naturalized from Europe. 



