54 Engelmann and Gray; 
306. Apnora (vide No. 175, supra) HuMILIs (n. Sp.): 
strigoso-pilosa ; caulibus basi ramosissimis adscendentibus dif- 
fusis ; foliis oblongis ovato-lanceolatisve obtusis basi attenuatis 
brevissime petiolatis superne demum glabratis; capitulis axil- 
laribus folio multum brevioribus paucifloris ; petalis in fl. masce. 
calycem paulo superantibus lanceolatis, in fl. feemineo subulatis 
glandulis disci brevioribus. —In hard clayey soil, west of the 
Brazos. March — August. (Also, Texas, Drummond, Col- 
lection Second, No. 230, and Dr. Wright.) Plant 6 to 8 
inches high; the base of the stem ligneous. Leaves an inch 
or an inch and a half long. The clusters contain one fertile 
and about four staminate flowers. The fruit and seeds not 
half the size of those of the two other Texan species; the 
latter globose and rugose, as in the other species, at first 
curiously striate-reticulated, but when old more even. 
307. Traci BREVISPICA (n. sp.) : multicaulis, ramosa, de- 
cumbens; ramis apice flexuosis vel subvolubilibus ; foliis e 
basi cordata truncatave triangulari-lanceolatis (superioribus 
fere linearibus) irregulariter acute dentatis parce pilosis petio- 
latis; spicis folio oppositis multo brevioribus ; flore fcemineo 
ad basin unico, masculis paucis ; capsulis hispidulis. — Black, 
clayey soil, in the prairies west of the Brazos. May — July. 
Differs from T. urticeefolia (perhaps not specifically) in the 
procumbent stems, which often form diffuse tufts two or three 
feet in diameter, and the smaller and narrower leaves, as well 
as the short spikes and smaller flowers and fruit; the latter is 
less hispid. 
308. Forestiera acuminata, Poir. Banks of the Brazos, 
near San Felipe. March. It extends as far north as on the 
Wabash, in Illinois.’ 
309. Quercus cinereA, Miche. Sandy, hilly soil; form- 
ing groves in the prairies west of the Brazos, along with 
1 Utmvus crassirotra, Nutt. was sparingly collected by Lindheimer; the tree 
was in flower, for the second time, in September. The perigonium is divided to 
the base into eight linear segments; and the ovary and fruit are villous, 
