CATALOGUE. 291 



base, dilated and herbaceous above in fruit, becoming often 2-3" in diameter, 

 the margin deeply and acutely toothed and undulate, the sides strongly retic- 

 ulated and frequently more or less crested. — From Dakota to New Mexico 

 and westward to California. Found in dry alkaline valleys or on foot-hills 

 from the Truckee Desert to Northeastern Nevada ; 4-6,000 feet altitude ; 

 May-September ; but only in flower. (985.) 



Obione phyllostegia, Torr. Annual and herbaceous, about 1° high, 

 erect, the branches ascending; stem and leaves nearly glabrous or somewhat 

 scurfy ; leaves about 1' long, deltoid-hastate or ovate-rhomboid, acute or 

 acuminate, abruptly attenuate into a slender petiole equaling the blade ; 

 flowers monoecious or wholly pistillate, the staminate in large and conspic- 

 uous axillary clusters ; bracts of the young fruit united into a somewhat 

 tubular base, hairy below, the limb above lanceolate, acuminate, entire or 

 gash-toothed ; style elongated, nearly equaling the bracts. — Near to O. 

 argen'iea, but a well-marked species, though the mature fruit is still wanting. 

 As a slight doubt remains respecting the position of the radicle, it may yet 

 prove to be an AtripUx. First found by H. Engelmann at " Gate of Gib- 

 raltar," Utah ; not rare on dry foot-hills and near hot springs, between the 

 Truckee and Humboldt Elvers, "Western Nevada, growing with the last ; 

 4,000 feet altitude; May. (986.) 



Obione teuncata, Torr. Annual and herbaceous, erect, branched, 

 2-3° high, slightly pulverulent and glaucous, furfuraceous above; lower 

 leaves on short petioles, broadly ovate, truncate or cordate at base, obtuse 

 or acutish, 1-2'' long, the upper ones sessile and cordate, acute, gradually 

 diminishing to the ends of the branchlets ; staminate clusters small and 

 inconspicuous ; fruit 1" in diameter, the bracts broadly obovate, united to 

 near the summit, which is truncate and denticulate, but slightly extended 

 beyond the naked disk.— Collected by Dr. Anderson (40) near Carson City, 

 and common on the Truckee River ; 4-4,500 feet altitude ; July. (987.) 



Obione pusilla, Torr. Annual, herbaceous, 2-4' high, diffusely 

 branched from the base, white-scurfy throughout; leaves small, 1-2" in 

 diameter, sessile and subamplexicaul, ovate, acute, crowded above ; flowers 

 monoecious, minute ; fruiting bracts *" long, ovate, acutish, entire, united 

 half their length. — Near O. microcarpa, Benth. First collected by Ander- 

 son (65) near Carson City. Found oa the edge of a dried alkali flat near 

 the head of Humboldt Valley ; 5,500 feet altitude ; September. (988.) 



