APPENDIX. 475 



9. BOEEHAAVIA, L. Fruit with 5, or Bometimea 10, ribs or angles ; flowers usually panioled or 

 racemose.— About a dozen species occur upon both sides of the Mexican boundary from W. Texas to 

 Arizona. 



10. PISONIA, L. Flowers diosoious, cymose-corymbed or umbeled; calyx' of the staminate flower 

 campanulate, of the p'stillate flower cylindrical ; fruit terete or ribbed, smooth or glandular. Trees 

 or shrubs.— Two species common from the West Indies to Brazil are found in S. Florida ; P. aouleatjV, 

 L., spiny, with alternate leaves and clavate glandular fruit, and P. obtusata, Sw., spineless, with opposite 

 leaves and oblong glandlesa fruit. 



IV. BOUGAmVILLE^, Chois. Involucre bract-lilse, large, dilated. 



11. HERMIDIUM, S. Watson. Flowers approximate in a head-like cluster, each pedicel adnate to 

 the midvein of the cordate colored bract ; flower and fruit nearly as in MiraHlis. See page 286. 



MIRABILIS. 



§ 1. NYCTAGE, Eoyen. Involucre 1-flowered. Calyx long-tubular or funnelform. Flowers large. 



1. M. Jaiapa, L. Cultivated. 



2. M. LONGIFLOEA, L. Viscid-pubescent, diffuse ; flowers sessile, clustered : involucral-lobes linear ; 

 calyx-tube very long. — W. Texas to S. Arizona and Northern Mexico. 



§ 2. QUAMOCLIDION, Chois. Nearly as the last, but the involucre 3-12-flowered. 



3. M. TKIFLOEA, Bentih. Involucre villous, 3" long ; calyx 6-12" long. — ^Mexico. 



4. M. MULTIFLOEA, Gray. Involucre glabrous, campanulate, 1' long, 5-cleft ; calyx 2' long ; stamens 

 4-5. — S. California to New Mexico. 



§ 3. OXYBAPHOIDES, Gray. Involucre 1-3-flowered. Calyx broad-fuunelform from a short tube ; 



flowers rather small. 

 5.' M. OXYBAPHOIDES, Gray. Involucre S-flowered, 5-parted ; stamens 3. — W. Mexico. 

 6, M. CALnroHNiCA, Gray. Involucre 1-flowered, 5-cleft ; stamens mostly 5. See page 284. 



OXYBAPHUS. 



5 1. Calyx short, suboampauulate or rotate-funnelform, slightly exceeding the involucre. 

 * Fruit glabrous, usually tuberculate along the ribs and sometimes between them ; involucre 

 1-3-flowered. 



1. O. AiSCOSUS, L'Her. — Mexico. 



2. O. GLABRiFOUtrs, Vahl. Flowers in crowded clusters terminating the branches. — Mexico. A 

 variety with 2-3-flowered involucre occurs in W. Texas. 



3. 0. AGGEEGATOS, Vahl. Peduuoles solitary, axillary, villous, somewhat nodding.— W. Texas and 

 Mexico. 



* * Fruit pubescent ; involucre always 3-5-flowered. 



4. 0. NYCTAGINEUS, Swcet. Leaves all petioled, (except the uppermost reduced ones,) obtuse or 

 cordate at base; fruit rather hirsute, sometimes subreticulate-rugose between the ribs.— Variable. 

 Wisconsin and the Upper Missouri to Texas and New Mexico. 



5. O. ALBIDUS, Sweet. Nearly glabrous except the inflorescence; leaves aU sn.bsessile, lanceolate or 

 oblong-lanceolate, acute at base ; fruit more hirsute, muriculate along or between the ribs.— N. Carolina 

 to Texas. 



6. O. HIESUTUS, Sweet. 1° high, hirsute throughout ; leaves lanceolate, thiok, the lower short- 

 petioled ; fruit of 0. nyctagineus.— From the Saskatchewan to W. Texas. 



7. 0. ANGUSTiFOLius, Sweet. 1-6° high, glabrous except the peduncles and involucres ; leaves linear ; 

 fruit pubescent. See page 284. 



§ 2. Calyx more narrowly funnelform, several times exceeding the involucre ; fruit clavate-oblong, 

 apiculate, pubescent, deeply sulcate between the stoiit ribs. 



8. O. COCCINEUS, Torr. EesembUng the last. New Mexico ; N. Sonora. 



9. O. Fecebblii, Behr. Truns. Calif. Acad. 1. 69. Soarious ; leaves cordate ; involucre 5-flowered ; 

 stamens 5 ; fruit undescribed.— A doubtful species. S. California. 



