t 

 Chenopodium. CHENOPODIACE.E. 47 



long, acute, coarsely and deeply sinuate-toothed : flowers in small clusters, in axil- 

 lary rather loose spicate panicles shorter than the leaves, or in a naked open termi- 

 nal panicle : seed sharply margined. 



Introduced ; chiefly near the coast, from San Francisco to San Diego. An Old "World species, 

 now common around the globe. 



C. HYBRIDUM, Linn. Glabrous throughout or only the inflorescence mealy, rather stout, erect, 

 2 to 4 feet high, simple or sparingly branched above : leaves usually large, 2 to 8 inches long, 

 broadly ovate-triangular, acuminate, somewhat cordate at base, sinuate with 2 or 3 large teeth on 

 each side : flowers in small clusters in slender diffuse terminal and axillary panicles : seed larger, 

 margin acutish. Another widely dispersed weed, but apparently indigenous in the mountains 

 of the interior from Washington Territory to Colorado and New Mexico ; not yet reported from 

 California. 



* * Pericarp) separating readily from the seed : leaves entire or Tiastately lobed : 



seed smaller. 



3. C. Fremontii, Watson. Erect, slender, branching, | to 2 feet high, more or 

 less mealy: leaves broadly triangular-hastate, ^ to 1 inch long, obtuse or abruptly 

 acute, truncate or cuneate at base, the upper rarely becoming oblong to linear-lanceo- 

 late : flowers often small, white-mealy, scattered in small clusters upon the slender 

 open-panicled branchlets, or the inflorescence sometimes stouter and more con- 

 tracted : sepals strongly carinate : seed one to two thirds of a line broad. Bot. 

 King Exp. 287 ; Rev. Chenop. 94. 



Near Fort Mohave (Cooper), and through the interior from the base of the Sierra Nevada to 

 Colorado and New Mexico. 



4. C. leptophyllum, Nutt. Erect, often strict, \ to 3 feet high, simple or 

 branched, densely mealy or often nearly glabrous : leaves linear, entire, a half to an 

 inch long, acute and usually mucronate, rather shortly petioled : flowers in small 

 dense clusters in dense or interrupted spikelets : sepals strongly carinate, acute : 

 seed half a line broad. Watson, Rev. Chenop. 94. C. album, var. leptophyllum, 

 Moquin in DC. Prodr. xiii 2 . 71. 



In the valleys and mountains from the eastern base of the Sierra Nevada to Dakota and New 

 Mexico ; also on the sea-coast from Rhode Island to New Jersey. 



2. Annual, not mealy, more or less glandular-pubescent, aromatic: seed very 

 small, not exceeding the dry perianth, often vertical : embryo curved. 

 BOTRYOIS, Moquin. 



* Flowers paniculate or spicate : seeds mostly horizontal, obtusely margined. 



5. C. Botrys, Linn. Glandular throughout, erect, a foot or two high, branched : 

 leaves ovate to oblong, an inch or two long, sinuately pinnatifid and the lobes usually 

 toothed : flowers somewhat solitary, in numerous slender diffuse axillary panicles : 

 sepals acute, loosely covering the fruit : pericarp persistent : seed scarcely a third of 

 a line broad. 



Sparingly introduced on the Pacific Coast, but common eastward and over much of the Old 

 World ; near Pyramid Lake, Lemmon. Originally from S. Europe, and frequently cultivated 

 for medicinal purposes ; popularly known as " Jerusalem Oak." 



6. C. ambrosioid.es, Linn. Scarcely glandular, erect or ascending, usually 

 stout and branched, 2 or 3 feet high : leaves lanceolate, shortly petioled, 2 to 

 5 inches long, sinuate-dentate ; the upper often small, linear-lanceolate and entire : 

 flowers in axillary clusters or usually in numerous slender axillary often elongated 

 spikes along the leafy branches : sepals obtuse, appressed to the fruit : pericarp de- 

 ciduous. 



Introduced from tropical America, and a common weed in many parts of the world, often used 

 as a vermifuge under the name of "Wormseed" ; in salt-marshes and waste places about San 

 Francisco and southward to San Diego ; Lake Tahoe, Lemmon. The var. rmthelminticum, with 

 more coarsely toothed leaves and. elongated leafless spikes, may also be found. 



