24 



PLANTiE WRIGHTIAN^. 



VI. 



\ 



Mountains, between the copper mines, New Mexico, and Santa Cruz, Sonora ; Sept. 



(900.) 



H. (Bombicella) Coulteri, Harv. in Pl Wright l c. Witli the preceding. (901.) 



Payonia Wrightii, Gra^, Gen. IU. 2. t 130, §* Pl Wright p. 12. Between the 

 Leona and the Sahinal, Westem Texas. (1333.) 



BYTTNERIACEtE. 



Melochia pyramidata, Linn. Margin of a stream at Painted Caves, on the 

 San Pcdro, Western Texas ; July. (1334) 



Hermannia Texana, Grai/, Gen. III. 2. t 135, §• Pl. Wright p. 34. Stony 

 prairies of Chicon Creek, Western Texas ; May. (902.) 



Atenia pusilla, Linn. var., Gray, Pl. Wright. p. 24. no. 645. Eocks hetween 

 Eagle Springs and the Limpio ; June. Also (with still narrower leaves) in Sonora, 

 between the Chiricahui Mountains and the San Pedro ; Sept. (903.) — The fertile 

 stamens adhere to the petals and come away with them. Tlie anthers are not bi- 



locular, as the genus is described, but trilocular ! 



A. microphylla (Grag, l. c.): foliis cordato-rotundis ; floribus in axillis solitariis 

 brevitcr pedicellatis ; petalorum lamina absque glandula dorsali ; tubo stamineo 

 brevissimo cyathiformi ; antheris fertilibus (trilocularibus !) sessilibus sterilibus dif- 

 formibus brevioribus ; ovario haud stipitato. — Rocky ravines near Frontera, New 

 Mexico; May: in ilower and fruit. (1335.) — I have completed the character of 

 the species from the flowering specimens gathered in the spring of the present year. 

 The flowers are smaller than in A. pusilla ; and the (dark red) petals have shorter 

 claws. The lamina of the latter, when outspread, has nearly the shape of the leaf 

 of Liriodendron ; the two terminal angles are pointed and apparently glandular at 

 the tips, by which they adhere to the column ; the notch bears an apical acumina- 

 tion which is strongly recurved, but is not produced into a gland, nor is there any 

 such dorsal appendage as in A. pusilla. The very short and cup-shaped stamineal 

 column is terminated by five thick lobes, or deformed sterile anthers, alternating with 

 the petals and much larger than the fertile anthers ; they are somewhat two-lobed, 

 like an ordinary anther, and bear a strongly reflexed and acuminate apical appen- 

 dage, like that of the petals. The fertile anthers are sessile in the sinuses, and con- 

 sist of three oval parallel cells, opening longitudinally. The ovary and capsule are 



nearly as in A. pusilla, except that they are not raised on a stipe. The obovate 

 seeds are rugose-corrugated. 



Waltueria detonsa (sp. nov.) : pube brevissima cinereo-tomentulosa ; caulibus 

 e basi lignescente plurimis gracilibus ; foliis ovalibus denticulatis haud plicatis ; 

 glomerulis axillaribus breviter pedunculatis ; calycibus et ovario canescentibus 

 (haud villosis). — Eocky hills on the Sonoita, near Deserted Rancho, Sonora; Sept. 

 (904.) — The slender stems are a foot or less in height ; the leaves about an inch 

 long, not plicate-veined nor- velvety like those of W. Americana ; the heads are 

 also smaller, and the calyx not all hirsute-villous. Mr. Bentham informs me that 

 he has apparently the same species from British Guiana; No. 497 of Rob. Schom- 

 burgk's second collection, and No. 761 of Eich. Schomburgk. 



f 



