688 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



7. Anthers conspicuously scarious-tipped; corolla rotate or broadly cam- 



panulate, deeply lobed, the tube very short (9) . 



9. Corolla rotate, the lobes short, ovate, flat; crown double, the outer 



portion annular and adnate to the base of the corolla, the inner 



portion consisting of 5 large turgid bodies adnate to the base of 



the column; inflorescences pedunculate, umbellike. 



8. Funastrum. 

 9. Corolla very open-campanulate, the lobes elongate, lanceolate or strap- 

 shaped, recurved at apex, more or less pubescent within ; crown 

 single, the segments lanceolate or subulate, at least above; stems 

 with a well-defined line of pubescence (10). 

 10. Leaves long-petioled the blades triangular-ovate, cordate, thin; 

 inflorescences short-racemose or corymbiform, pedunculate, 

 several-flowered; corolla 8 mm. long or longer, whitish, with 

 strap-shaped lobes; segments of the crown subulate from a 

 broad, ovate, or subquadrate base, nearly equaling to slightly 



surpassing the corolla lobes 9. Mellichampia. 



10. Leaves short-petioled or subsessile, the blades linear or narrowly 

 lanceolate, not cordate, thickish; inflorescences umbellike, nearly 

 sessile, few-flowered or the flowers solitary; corolla about 3 mm. 

 long, with lanceolate lobes; segments of the crown subulate or 

 lanceolate, much shorter than the corolla lobes (11). 

 11. Corolla lobes valvate in the bud, conspicuously white-pilose within ; 

 segments of the crown subulate; stigma truncate, rounded, or 



merely apiculate 6. Metastelma. 



11. Corolla lobes slightly imbricate in the bud, puberulent within; 

 segments of the crown lanceolate or triangular-subulate; 

 stigma long-beaked 7. Basistelma. 



1. ASTEPHANUS 



A glabrous herb with slender twining stems; leaves narrowly 

 linear; flowers small, yellowish, in axillary clusters of 3 to 5; corolla 

 without a crown, campanulate, dull yellow, the lobes inflexed at apex; 

 pods long-acuminate; seeds rough-granulate. 



1. Astephanus utahensis Engelm., Amer. Nat. 9: 349. 1875. 



Near Yucca, Mohave County {Jones in 1884), also, without definite 

 locality {Palmer 440), April to June. Southern Utah and north- 

 western Arizona to southeastern California. 



2. GOMPHOCARPUS 



An erect, leafy-stemmed herb, similar to Asclepias but the hoods 

 not appendaged within; leaves short-petioled, the blades oval or 

 oblong, white-tomentose beneath; umbels terminal or nearly so, 

 long-stalked, many-flowered; hoods of the flowers lurid red. 



1. Gomphocarpus hypoleucus A. Gray, Amer. Acad. Arts and Sci. 

 Proc. 17: 222. 1882. 

 Mountains of Cochise and Pima Counties, 6,000 to 8,000 feet, open 

 pine forests, July and August, type from the Santa Rita Mountains 

 {Pringle in 1881). Southern New Mexico and Arizona, northern 

 Mexico. 



3. ACERATES 12 



Leafy-stemmed herbs, similar to Asclepias; leaves alternate or 

 nearly opposite; umbels lateral, many-flowered; flowers green or 

 greenish purple. 



i 2 Reference: Vail, Anna M. a revision of the genus aceeates in the united states. Torrey 

 Bot. Club Bui. 25: 30-38. 1898. 



