356 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Irom the species this differs in its stouter habit, thicker aud more erect 
leaves, 1-fruited involucres (there are sometimes 3 flowers in the involuere, but 
only one matures), and the form of the fruit. The fruit of the species is merely 
faintly angled, acutish above, minutely hispidulous, and not very prominently 
tuberculate, while that of subspecies uniflora is larger, with 5 prominent and 
thick ribs, strongly transversely ridged or tuberculate between the ribs. and 
more densely and more prominently hispidulous as well as more obtuse above. 
Specimens eramined: 
KANSAS: Belvidere, 1897, Ward, type collection. 
OKLAHOMA: Limestone Gap, 1877, Butler 2; Osage Nation, 1895, Kimmons : 
Indian Territory, 1891, (. 8. Sheldon 226. 
Texas: Terrell, 1904, Ff. J. Tyler; Corpus Christi Bay, 1894, Heller 1545: 
Baird, 1882, Letterman 129; Industry, 1894, H. Wurelow 27: 1844, 
Lindheimer 293; Dallas, 1877, Reverchon T87; Houston, 1842, Lind- 
heimer; Texas, Buckley; Gillespie County, Jermy. 
41, Allionia albida Walt. Fl. Car. 84. 1788, 
Calymenia albida Nutt. Gen. N. A. Pl, 26, 1818. 
Oxrybaphus albidus Sweet, Hort. Brit. 2: 429, 1825, 
Mirabilis albida Heimer], Ann. Cons. et Jard. Geneyv. 5: 182. 1901. 
The only specimens that I have seen of this species were from South Caro- 
lina and the adjoining States. 
42. Allionia pseudaggregata (Heimerl) Standley. 
Mirabilis pseudaggregata Heimer], Ann. Cons. et Jard. Genev. 5: 183. 1901, 
Specimens eramined: 
Mexico: Near Chihuahua, 1886, Pringle 793, type collection, 
TEXAS; Chenate Mountains, 1889, Vealey 528: near J. Davis's Ranch. 1883, 
Havard 66. 
42a, Allionia pseudaggregata subhirsuta (Heimer!) Standley. 
Mirabilis pseudaggregata subhirsuta Weimerl, Ann. Cons. et Jard. Gentev. 5: 
184. 1901. 
This differs from the type collection in having the stems and leaves more 
hirsute throughout. If the plant which I have placed here is the same as that 
upon which the variety was founded it is probably a good species. 
Specimens ewamined: 
Mexico: Durango, 1896, Palmer 267. 
The disposition of the following names is still unsettled : 
OXYBAPHUS LINEARIFOLIUS 8. Wats. Proc. Amer. Acad, 17:375. 1882. 
I have not been able to examine any authoritative material of this species. 
It may be A. divaricata or perhaps some plant more closely related to A. 
linearis. 
OXYBAPHUS ANGUSTIFOLIUS viscipUS Hastw. Proc. Cal. Acad. Sei. Il. 6: 212. 
1896. 
Allionia viscida Cockerell Proc. Acad. Phila. 1904: 108. 1904. 
I have seen no reliable material of this species; it may be 4. diraricata. 
6. ALLIONIELLA Rydb. 
Allioniella Rydb. Bull, Torr. Club 29: G87. 1902. 
Low, much branched herbs with ascending or procumbent branches: leaves 
opposite, entire, petioled, viscid; flowers loosely panicled, 3 in each involucre: 
