236 Engelmann and Gray, 
multo breviora. Stylus brevis (filamenta adeequans,) tenuis, 
apice trilobus ; lobis bipartitis, partitionibus in stigmata filifor- 
mia radiatim productis. 7 
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 
æquantia : connectivum latum basi apicemque versus praeser- 
tim dilatatum, loculis marginalibus. Stylus elongatus (stamina 
adeequans,) ad apicem infundibuliformis, trifidus ; lobis bifidis, 
partitionibus in stigmata filiformia recurvia attenuatis.— Habi- 
tus, bulbus, capsula, etc., omnino Nemostylis. s 
1 GywNADENIA 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 
he upper side into a triangular blunt auricle, which is not 
noticed in Nuttall's description. The anther-cells are parallel 
and approximated. = i i ‘sighs 
*191. SPIRANTHES VERNALIS (n. sp.): radice fasciculata ; 
caule foliato ; foliis linearibus, superioribus sensim minoribus 
vaginantibus lanceolato-subulatis ; sepalis petalisque basi .co* 
hzerentibugggblongo-linearibus, lateralibus angustioribus label- 
lum reflexüm crenulatum apice non dilatatum wquantibus 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. Eume 
much as in S. cernua, from which it is distinguished by s 
short lip, &c. — a ij ina M : 
-199. THALIA DEALBATA, Fraser. Swamps on the n 
September. — The seed appears to contain three embryos f 
which only the central one is fully developed. e il 
. 193. Juncus HtrrRANTHos, Nutt. in, Trans. Amer- Ph 
Soc. (N. Ser.) V. p. 153. Galveston Island.. May- 
. 194. Ponreperta LawciroLra, Muhl. July. = — —— 
195. SwrLAx LaNcEoLATA, Linn. Rich shady soil neat 
