RypDBERG: STUDIES ON THE Rocky MowunTaIN Frora 685 
than to A. e/liptica A. Nelson. From this it differs in the upright 
stem, which is decidedly viscid-pubescent instead of merely pu- 
berulent. 
Urau: Salt Lake City, 1879, MW. E. Jones, 1 337 (type in U.S. 
Nat. herb., also in herb. Columbia University). 
8. ABRONIA ELLIPTICA A. Nelson, Bull. Torrey Club, 26: 7. 
: 1899 
Wyoming and Colorado. 
/ 9. Abronia glabra sp. nov. 
Perennial : stem ascending, about half a meter high, glabrous, 
straw-colored: leaves thick, glabrous; petioles 1-2 cm. long ; 
blades oval to oblong, 1-4 cm. long, obtuse : peduncles oval, 2-4 
cm. long, glabrous; bracts obovate or about 5 mm. long, acute: 
flowers 12-15 mm. long, numerous: fruit cuneate-obpyramidal, 
with the wings 4-5 mm. wide and 7-8 mm. long: wings very 
thick, of two lamina, semi-cordate at the apex: wingless tip of the 
fruit very short. 
This species is intermediate between A. e//iptica and the next 
Species. From the former it differs in the glabrous stem and the 
Stricter habit, from the latter in the broader and shorter bracts 
and the smaller flowers. 
CoLorapo: Grand Junction, 1883, 17. £. Jones (type in U. S. 
Nat. herb.). 
v10. Abronia lanceolata sp. nov. 
Perennial : stem glabrous, decumbent, several decimeters long: 
leaves rather thick; glabrous ; petioles 2-3 cm. long; blades ob- 
long-oval, 2-5 cm. long, I-1.5 cm. wide: peduncles 5-15 cm. 
long; bracts 6-8, lanceolate, acute or acuminate, about I cm. 
ong: flowers numerous, about 1.5 cm. long, with a limb 4-5 
mm. wide: fruit with the thin wings about 8 mm. wide and about 
as long, cuneate-obpyramidal in outline, puberulent: wings 
Strongly reticulate, semicordate at the apex, where the tip of the 
achene extends for about 2 mm. . 
The type was labeled A. fragrans, which species it resembles 
in general habit, but it is easily distinguished both by the narrow 
bracts and the strongly winged fruit. These characters place it 
Nearer A. Carletoni Coult. & Fisher which is of a different habit and 
has a puberulent stem. A. /anceolata grows in drifting sand. 
