408 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Type locality, "State of Chihuahua, cool elopes, Mts. near Chihuahua." Type 

 collected by C. G. Pringle (no. 793). 

 Specimens examined: 



Chihuahua: Type collection, 



San Luis Potosi: 187S, Parry & Palmer 763; San Miguelito Mountain near San 

 Luis Potosi, 1876, Schaffncr 177. 



Mexico: Valley of Mexico, Guadalupe, August 1, 1861, Bourgeau 651. 



Durango: Durango, 1896, Palmer 267. 



Queretaro: Del Ciervo al cerro de la mesa, August 20, 1905, Altamirano 1591 

 and 1604. 

 Doctor Ileimerl described the species as occurring in two forms, subhirsuta and 

 eglandulosa. Both were described from Pringle's 793 and are to be considered as 

 belonging to the same species, not even differing in a subspecific way. The two 

 specimens from Queretaro are perhaps distinct; they have narrower leaves and more 

 abundant pubescence than the type, while the involucres seem slightly different. 

 The fruit is exactly the same, however, and it seems unwise to separate them, espe- 

 cially since the material is of unsatisfactory quality. 



As a synonym of this species, with but little doubt, should be placed Mirabilis 

 aggregata Cav." The plant figured has stems glabrous, at least below, lanceolate 

 leaves, axillary inflorescence, and cleistogamous flowers. It is probably a young 

 plant of this species. The name has been cited as a synonym of Allionia decumbent 

 Nutt., which seems to have been based upon a young plant of A. lanceolata Rydb. or 

 possibly even of A. linearis. No Allionia of the region from which A. decumbens was 

 described extends into that part of Mexico where Mirabilis aggregata Cav. was found, 

 hence the two can not be synonymous. Cavanilles gives the source of his plant as 

 "In viciniis Sancti Augustini de las Cuevas in Nova Hispania." This locality is in 

 the immediate vicinity of the City of Mexico, the locality where Bourgeau's speci- 

 men listed above was collected. 



18. Allionia trichodonta Standley, Contr. Nat. Herb. 12: 354. 1909. 



Type locality, "Ixmiquilpan, Hidalgo." Type collected in 1905 by C. A. Purpus. 

 Specimens examined: 



Hidalgo: Type specimen. 



19. Allionia coahuilensiu Standley, Contr. Nat. Herb. 12: 347. 1909. 

 Oxybaphus coahuihnsis Weatherby, Proc. Ainer. Acad. 45: 425. 1910. 

 Type locality, "Saltillo, Coahuila." Type collected in 1898, Palmer 158. 



Here can be placed, temporarily at least, Purpus's 3932, collected at the Cerro de 

 Chicamale, Puebla, August, 1909. 



20. Allionia greggii Standley, Contr. Nat. Herb. 12: 318. 1909. 



Type locality, "San Antonio, near Saltillo." Type collected by Gregg, Septem- 

 ber 1, 1848 (no. 394b). 



21. Allionia suflfruticosa Standley, sp. nov. 



Low, much branched; sterns slender, woody below and glabrous, puberulous and 

 viscid above; leaf blades small, yellowish green, glabrous, deltoid-ovate, acutish, all 

 on slender petioles about one-fourth as long; inflorescence corymbosely branched, the 

 rather few involucres 5 mm. high, 3-flowered, densely hispidulous, their lobes acute; 

 perianth twice as long as the involucre, purplish red; fruit 5 mm. long, hirtellous, the 

 ribs broad and smooth. 



Type in the U. S. National Herbarium, no. 841004, collected at Los Naranjos, 

 Oaxaca, June, 1908, by C. A. Purpus (no. 3378). 1 have seen no other Allionia with 

 a truly woody stem. The plant in habit and general appearance strongly suggests 

 Borne of the species of Hesperonia. 



a Icon. PI. 5: 22. pi. 437, 1799. 



