Se LET 
RypBERG: STUDIES ON THE Rocky MounTAIn Fiora 683 
v 2. Abronia nudata sp. nov. 
Perennial, stems very long and decumbent, sparingly hispidu- 
lous: leaves thick, glabrous ; petioles 2-10 mm. long; blades 
broadly lanceolate, obtusish, 2-5 cm. long: peduncles 4-6 cm. 
long, almost glabrous : bracts ovate-lanceolate, less than I cm. 
long: flowers many, about 2 cm. long; limb 5-6 mm. wide: 
achenes very irregular, the inner ones of the head bipyramidal, 
thickest a little above the middle, crested, 8-10 mm. long, those 
of the margin very obliquely ovoid-fusiform, scarcely at all crested. 
This species is nearest related to A. fragrans and A. ammo- 
Phila. From the former it differs in the small bracts, smaller 
leaves and almost glabrous stem; and from the latter in the much 
longer flowers and the scanty or no pubescence. 
Montana: Colgate, near Glendive, 1892, Sandberg, Mac- 
Dougal & Heller, 1016 (type in herb. N. Y. Bot. Garden). 
3. Abronia pumila sp. nov. 
Perennial, caespitose: stems ascending, about 1 dm. long, 
puberulent : leaves very thick, minutely puberulent ; petioles 1~2 
cm. long, those’ of the stem-leaves usually shorter than blades ; 
these 1.5~3 cm. long, oval, elliptic or somewhat ovate: peduncles 
2-3 cm. long, puberulent : bracts elliptic-ovate or lanceolate, 7-8 
mm. long, short-acuminate: flowers about 12 mm. long; limb 
~ about 3 mm. wide: fruit bipyramidal, 2. ¢., tapering towards both 
ends but more so downwards, the greatest breadth being about one 
third from the apex, merely crested or the inner ones somewhat 
winged. 
Dr. Heimerl referred this to A. truncata Torr., but the fruit is 
very unlike that of that species. A. pumila is nearest related to 
A. ammophila, from which it differs mainly in the thicker and short- 
_ petioled leaves and the dwarfed habit. ~ 
Uran: Emery, 1894, WZ E. Jones, 54459 (type in U. S. Nat. 
herb.); six miles up Salida Cafion, 5476a. 
4. ABRONIA AMMOPHILA Greene, Pittonia, 4: 226. 1900 
Abronia arenaria Rydb. Mem. N. Y. Bot. Garden, 1:137. 1900. 
Not Menz. 1827. 
Yellowstone National Park. 
5. Apronra NANA S. Wats. Proc. Am. Acad. 16: 294. 
Southern Utah to Arizona and southern California. 
1870 
