48 Engelmann and Gray, 
bilabiati labio superiore erecto subgaleato breviter bilobo vel 
integro, inferiore profunde trifido, lobis rotundatis patentibus 
seu recurvis. Stamina 4, sub labio superiore adscendentia : 
filamenta supra medium corollz adnata, ubi pilosa, inferioribus 
eminentibus: anther approximate ; loculis distinctis divari- 
cantibus ad rimam pl. m. ciliatis. Stylus glaber apice zquali- 
ter bifidus, lobis subulatis. Achenia sicca.— Herbe annue, 
Texane, facie -: et inflorescentia Physostegiz. Corolla 
incarnata, fauce Juteola. 
§ 1. Eusrazoria. Calycis lobi latissimi, truncati, subzequa- 
les, mucronato-denticulati: corolla majuscula tubo prope basin 
piloso-annulato ; fauce infra labium inferiorem intrusa quodam- 
modo palatum efficiente ; lobis omnibus eroso-crenulatis, iisdem 
labii inferioris zequalibus, apice bilobis: achenia triangulata, 
pubera. 
286. Brazoria TRUNcaTA = Physostegia truncata, Benth. 
Lab. p. 505; Hook. Bot. Mag. t. 3494.— Sandy soil on de- 
serted ant-hills, &c., in the prairies along the Brazos: May — 
June. It was first collected by Drummond (No. 274 of the 
Third Collection) ; and has since been gathered on the Colo- 
rado by Dr. Wright. Stem pubescent, scarcely a foot high. 
Spike dense. Calyx hairy at the base, especially after flower- 
ing. Flowers nearly as large as in Physostegia Virginiana : 
the tube of the corolla spotted with purple. The lobes of the 
lower lip of the calyx are usually merely mucronulate in the 
middle ; those of the upper are erose-denticulate with mucro- 
nulate teeth. In fruit the achenia are contained in a gibbous 
cavity belonging to the upper side of the calyx: this is closed 
by the inflexion of the lower lip, which is appressed to the 
face of the upper, or partly wrapped around it; so that the 
fructiferous calyx is flat on the lower side, and very gibbous at 
the base of the upper side. 
§ 2. Sracuyastrum. Calycis sub-7-nervis labium superius 
latum, lobis rotundatis; inferius angustum, lobis triangu- 
lari-lanceolatis, omnibus cuspidato-mucronatis: corolla exan- 
nulata, parvula ; lobo medio labii inferioris ceteris majore, 
