ALLIONIACEAE. 123 



Stem puberulent. 2. A. elliptica. 



Stem glabrous. 3- A. glabra. 



Bracts oblong-lanceolate or lanceolate, attenuate or cuspidate. 



4. A. Carletoni. 

 Fruit completely surrounded by the broad netted-veined membranous wings. 



Flowers 3 cm. or more long ; limb about i cm. wide ; peduncles longer than the 



leaves. 5- A. cycloptera. 



Flowers 1.5-2 cm. long; limb about 5 mm. wide. 6. A. micrantha. 



1. Abronia fragrans Nutt. In dry sandy soil from S. D. to Ida., Kans. and 

 N. M. Alt. 4000-7000 ft. New Windsor, Weld Co.; Crow Creek; Ft. Col- 

 lins; Salida; Cucharas River, below La Veta; Walsenburg; near Pueblo; 

 Table Rock; Fossil Creek; Colorado Springs. 



2. Abronia elliptica A. Nels. (A. Bakeri Greene.) In sandy soil in Wyo. 

 and Colo. Alt. 4000-5000 ft. Deer Run ; Grand Junction ; Rifle, Garfield Co. 



3. Abronia glabra Rydb. In dry arid soil in Colo, and Utah. Grand 

 Junction ; near Ft. Collins ; Hotchkiss. 



4. Abronia Carletoni Coult. & Fisch. Dry plains of Colo. Alt. about 5000 

 ft. Ft. Collins. 



5. Abronia cycloptera A. Gray. Plains from Wyo. to Tex. and Calif. 

 Exact locality not given. 



6. Abronia micrantha A. Gray. On dry mesas and in sandy soil from S. D. 

 to Mont, and N. M. Alt. 4000-9000 ft. Near Pike's Peak; Crow Creek; 

 Canon City; Grand Junction; Trinidad; valley of upper Arkansas River; 

 Swallows, between Canon City and Pueblo ; near Badito ; near Pueblo ; head- 

 waters of Sangre de Cristo Creek; Walsenburg; Salida; New Windsor; 

 Conejos River, north of Antonito. 



2. QUAMOCLIDION DC. FOUR-O'CLOCK. 



i. Quamoclidion multiflorum Torr. (Mirabilis multiftora A. Gray.) In 

 valleys from Colo, to Utah, Texas and Ariz. Alt. 4000-7000 ft Florence ; 

 Pueblo; Deer Run; Cucharas Junction; Canon City; Cucharas Valley, near 

 La Veta ; Grand Junction ; Cimarron ; Pueblo ; Florence. 



3. ALLIONIELLA Rydb. 



i. Allioniella oxybaphoides (A. Gray) Rydb. (Mirabilis oxybaphoides A. 

 Gray) In valleys from Colo, to Utah and Tex. Alt. 7000-8000 ft. Salida; 

 Buena Vista ; Trail Glen. 



4. ALLIONIA Loeffl. UMBRELLA-WORT. 



Leaves from cordate to broadly ovate-lanceolate ; all distinctly petioled. 



1. A. nyctaginea. 

 Leaves ovate-lanceolate, oblong or linear, sessile or only the lower short-petioled. 



Involucres in open terminal cymes. 



Stem more or less hirsute as well as viscid. 



Leaves ovate or broadly oblong, as well as the stem conspicuously hirsute. 



2. A. hirsuta. 

 Leaves linear-lanceolate, almost glabrous ; stem sparingly hirsute or glabrous 



except under the nodes. 3- A. pilosa. 



Stem glabrous below, not hirsute, viscid-puberulent above. 



Lower leaves ovate, rounded at the base. 4- -4. sessilifolia. 



Lower leaves lanceolate to linear, tapering at the base. 



