coe, ee eae cle i “4 
F #315 * [ 174 ] 
Pe new species a to the section Chylismia of Nutt. (Torr. a nd © é 
r. Fl. N. Nin Lap 506.) ™_ : ati 
entree DELTOIDES. Torr. and Fré 
hantnins canescently strigose ; stem low and stout; leaves iecliembieorste, 
repandly denticulate, acute ; flowers (large) clustered at the summit of the 
short stem; tube of the calyx nearly twice the length of the segments ; 
tals entire, one-third longer than the slightly declined stamens ; anthers a 
long, fix ed by the middle; style exserted ; capsules prismatic-cylindrical. j 
Allied to Gi. Jamesii, Torr. and Gr 5 and si like that species, to ; 
the section Ev@noruera and siibealitiond Onagra j 
(Enornera canescens. Torr.and Frém.* ~ 
Strigosely canescent ; leaves narrowly re rather obtuse, remotely | 
denticulate ; flowers in a leafy raceme; tube of the calyx rather slender, 
three times as long as the ovary, and one-third ede than the segments; 
petals broadly ovate, entire 
« This species was collected (we believe) on the upper waters of the _ 
It belongs to the section Eucenothera, and to a sub-section which may be 
called Gavropsts, and characterized as follows: Perennial diffuse a or 
tube of the calyx linear; capsule obovate, sessile, with 4-winged 
and no intermediate ribs, ‘tardily opening; seeds numerous, horizontal the 
testa membranaceous ; leaves ue. 
Besides these new species, ! other (notherawere collected ; er 
which may be mentioned @. albicaulis, alyssoides, montana, and 
souriensis. Also, Gayophytum diffusum, (from the Snake coUuDtrfygtOW- 
ing about 2 feet high,) Stenosiphon virgatum, and Gaura coccinea. 
ComposirTz. 
The plants of this family were — in the hands of Dr. Gray forex- 
amination; and he has described some of them (including four new gen- 
era) in the Boston Journal of Natural History for January, 1845. He has 
since ascertained another new genus among the specimens; and w 
concur with him in the propriety of dedicating it to the ate | 
I. N. Nicollet, Esq., who spent several years in exploring eolMoys 4 
tered by the Mississippi and Missouri rivers, and who was e oyed rik the” : 
United States Government in a survey of the region lying between the 
sources of those rivers. This gentleman exerted himself to make known 
the botany of the country which he explored, and brought home with him 
an interesting collection of tem made under his direction, by Mr. Charles __ 
Geyer, of which an account is given in the report of Mr. N. The follow- 
ing is the description of this genus by Dr. Gray: . 
Niconnerra. Gray. 
“ Heads het ith fev y flowered. Invol ic oa 
ulate, consisting of about 8 oval memb esina single series; 
base two smalle Yeah Receptacle convex, al re0- 
qually 5-toothed. Branches of the sty 
