STANDLEY ALLIONIACEAE OF MEXICO. 405 



5. Allionia mollis Standley, sp. nov. 



Slender, lax, much branched, about 80 cm, high; stems bright green, glabrous 

 below, above sparingly beset with inconspicuous gland-tipped hairs; leaf blades 

 deltoid-ovate, obtuse, subcordate at the base, thin, bright green, glabrous, on petioles 

 almost as long as the blades; inflorescence slender and weak, few-flowered, corym- 

 bosely branched, leafy; involucres 3-flowered, about 5 mm. high, viscid, the lobes 

 obtuse; fruit 3.5 mm. long, acute above, scarcely ribbed, glabrous, blackish brown. 



Type in the National Herbarium, no. 460695, collected on ledges at El Salto, State 

 of Mexico, altitude 2,150 meters, September 18, 1902, by C. G. Pringle (no. 11337). 

 While closely related to A. violacea it may readily be distinguished by its narrower, 

 obtuse leaves and by the numerous gland-tipped hairs of the stem, besides which 

 it is a larger plant and more branched. 



6. Allionia cardiophylla Slandley, sp. nov. 



Plants stout, 70 to 90 cm. high; stems glabrous below, more or less puberulent 

 above and about the nodes, sparingly branched; leaf blades ovate, acute, cordate at 

 the base, glabrous, rather thick and fleshy, on petioles one-fourth to two-thirds as 

 long; petioles puberulous; inflorescence corymbose, the branches widely spread- 

 ing; involucres almost 5 mm. high, hispidulous, mostly 3-flowered; fruit sometimes 

 strigillose when young but becoming glabrous, conspicuously verrucose. 



Type in the U. S. National Herbarium, no. 566116, collected 6 miles above Domin- 

 guillo, Oaxaca, altitude 1,380 to 1,690 meters, October 30, 1894, by E. W. Nelson 

 (no. 1830). 



7. Allionia deltoidea Standley, sp. nov. 



Stems slender, erect, 30 to 40 cm. high, much branched, the branches ascending, 

 glabrous except about the inflorescence, there somewhat viscid, the pubescence dis- 

 posed in 2 lines along the stem; leaf blades deltoid-ovate, 20 to 35 mm. long and 10 

 to 16 mm. wide, usually truncate at the base but sometimes subcordate, acute, 

 glabrous or slightly puberulent, rather fleshy, bright green; petioles one-third to one- 

 half as long as the blades, villous; inflorescence irregularly paniculate or cymose, 

 sparingly branched; involucres 3-flowered, short -pediceled, some solitary in the axils 

 of the leaves, about 7 mm. high, divided two-thirds of the way to the base or more, 

 the lobes oblong-ovate, obtuse, abundantly white-villous especially along the margins; 

 perianth about 9 mm. long and 15 mm. wide, almost or quite glabrous; fruit dark 

 brown, 3 mm. long, the ribs narrow and tuberculate-roughened , the spaces between 

 them rather broad and slightly rugulose transversely, glabrous or rarely minutely 

 strigillose. 



Type in the U. S. National Herbarium, no. 266904, collected by E. W. Nelson at 

 La Ventura, Coahirila, August 2 to 5, 1896 (no. 3923). The plant suggests A. melano- 

 tricha but the glabrous fruit and the long, villous pubescence of the involucres readily 

 distinguish it. From A, cardiophylla it may be separated by the smaller leaves not 

 cordate at the base, the smaller size of the plant, and the larger flowers. 



8. Allionia texensis (Coulter) Small, Fl. Southeast. IT. S. 406. 1903. 

 Oxybaphvs rjlabrifolius Torr. Bot. Mex. Bound. 168. 1859, not Vahl. 

 Allionia corymbosa texensis Coulter, Contr. Nat. Herb. 2: 351. 1894. 

 Oxybaphus texensis Weatherby, Proc. Amer. Acad. 45: 425. 1910. 

 Type locality, "Valleys near the Rio Grande, below El Paso," Texas. 



A specimen in the Gray Herbarium collected at San Miguel El Grande, December, 

 1827, Berlandicr 1314, certainly belongs here. Just where this particular locality is 

 I have not been able to determine. The species was also collected by Dr. J. N. 

 Rose at San Juan Capistrano, Zacatecas, August 22, 1897 (no. 2474). 



9. Allionia microchlamydea Standley, sp. nov. 



Plants 40 to 70 cm. high; stems glabrous below, sparingly viscid-puberulent above; 

 leaf blades glabrous, 50 to 60 mm. long and 15 mm. wide or less, lanceolate, obtuse, 

 subcordate at the base, rather thick and fleshy; lower leaves long-petioled and even 



