28 Engelmann and Gray, 
multo breviora. Stylus brevis (filamenta adzequans,) tenuis, 
apice trilobus ; lobis bipartitis, partitionibus in stigmata filifor- 
mia radiatim productis. 
EUSTYLIS. Perigonium hexaphyllo-partitum, conforme, 
patens ; tubo nullo; segmentis obovatis planis, tribus interio- 
ribus modice minoribus. Filamenta distincta, e basi lato 
subulata, antheras subpanduriformes post anthesin immutatas 
gequantia: connectivum latum basi apicemque versus preeser- 
tim dilatatum, loculis marginalibus. Stylus elongatus (stamina 
adzequans,) ad apicem infundibuliformis, trifidus ; lobis bifidis, 
partitionibus in stigmata filiformia recurvia attenuatis.— Habi- 
tus, bulbus, capsula, etc., omnino Nemostylis. 
190. GymnapEentA NivEA. (Orchis nivea, Nutt.) Moist 
prairies near Houston; April to June. The ovary remains 
straight ; the labellum is therefore posterior. The outer lat- 
eral divisions of the perianth are also produced at the base on 
the upper side into a triangular blunt auricle, which is not 
noticed in Nuttall’s description. The anther-cells are parallel 
and approximated. 
191. SprraNTHES VERNALIS (n. sp.): radice fasciculata ; 
caule foliato ; foliis linearibus, superioribus sensim minoribus 
vaginantibus lanceolato-subulatis ; sepalis petalisque basi co- 
hzerentibus oblongo-linearibus, lateralibus angustioribus label- 
lum reflexum crenulatum apice non dilatatum zequantibus vel 
superantibus. — Moist prairies, Galveston and Houston ; April, 
May. — Stem 1 to 2 feet high, slender ; lower leaves often 5 to » 
6 inches long, 2 lines wide ; bracts ovate, acuminate. Flowers 
much as in JS. cernua, from which it is distinguished by its 
short lip, &c. 
192. Tuaia pEALBATA, Fraser. Swamps on the Brazos; 
September.— The seed appears to contain three embryos, of 
which only the central one is fully developed. 
193. Juncus neTerantuos, Nutt. in Trans. Amer. Phil. 
Soc. (N. Ser.) V. p. 153. Galveston Island. May. 
194. Ponreperta LancirouiA, Muhl. July. 
195. Smitax tancronata, Linn. Rich shady soil near 
