CATALOGUE. 125 
Preratonyx THurRBERI, Gray (Bot. Mexican Boundary, tab. 22).—South- 
ern Nevada. 
Peratoyyx nitipus, Watson (Amer. Naturalist, 7, 300).—Differing 
from the above in having its leaves distinctly petioled, serrate, “ vitreous 
and shiny” and nearly alike in size (1-1}’ long) to the ends of the 
branches. Flowers also are in short, dense, cymose panicles.—Also 
from Southern Nevada—Puare IV. Fig. 1. Branch nearly natural size. 
2. Flower. 3. A single petal. 4. Diagonal section through pistil show- 
ing the single suspended ovule and two calyx-lobes. All except the branch 
enlarged. 
Menrzeuia nupa, T. & G.—6-18’ high, very rough, with short, 
almost cartilaginous bristles, usually branched from the root; leaves 
linear or lanceolate, nearly entire, or deeply pinnatifid; exterior filaments 
more or less dilated, antheriferous; petals nearly or about twice as 
long as the linear calyx-segments; seeds very numerous, winged, and 
somewhat flat—Colorado (764, 765); Fort Wingate, N. Mex., Professor 
Loew, coll. | 
Merntze.ia asperA, L.—Annual; usually slender leaves, 3-lobed (the 
terminal lobe largest, irregularly toothed); petioles 4” long, slender ; flowers 
sessile or nearly so; petals 2” long, equalling the subulate calyx-teeth; 
capsule 1’ long, regularly club-shaped. The few flattish seeds pendulous, 
under the lens marked with curved longitudinal lines. Not winged— 
Sanoita Valley, Arizona, at 6,000 feet altitude (642). I had doubtfully 
named this MW. albicaulis, Dougl., but from Mr. Watson’s description in Fl. 
Cal. 1, p. 235, have assigned it here. Number 928 of Thurber’s collection 
is in part the same, but is under MV. albicaulis. 
MenTZELIA ALBICAULIS, Dougl—Colorado (768); Nevada. 
Mentzevia Lavicauutis, T. & G.—Utah. 
linear-oblong, pilose, 2-lobed at base, connective produced beyond the anther-cells into an et 
sub-infla process. Staminodia 0. Ovary inferior, 1-celled; style short, stigma ovoi 
ovule hanging from the apex of the cell. Fruit dry, indehiscent, oblong or obovoid, Sad by 
the calyx and corolla. Exalbuminous seed, conformed in shape to the cell; testa membranaceous, 
smooth ; cotyledons amygdaline; radicle very short.—Branching herbs, with the habit of Scabiosa, can- 
escent-pubescent, setose, with larger simple bristles arising out of glands, smaller ones short, thick 
[transversely tubercular roughened] ; bark white, shining. Sessile leaves alternate, sinuate-pinnatifid. 
Flowers terminating the ae me tag in hemispherical heads, silky hirsute. Involucre of 
linear-setaceous bracts.—BENTHA 
