320 On New Genera and Species of Nyctaginacee. 
much so as to forbid the separation of Tripterocalyx as any thing 
more than a subgenus,—but the wings are triangular, pointed, and 
entirely lateral, not meeting over the summit of the fruit. ‘Its 
flowers too are greenish, while those of A. cycloptera are light 
purple. Furthermore, what Dr. Torrey takes for the Abronia 
mellifera is the A. fragrans, Nutt. in herb. Hook., which is dis- 
first noticed by Dr. Torrey in his A. micrantha, he has since 
shown to exist throughout the genus; the inner cotyledon being 
constantly wanting. Dr. Torrey’s observation appears to have 
Prof. Choisy’s notice. In Emory’s Report, Dr. Torrey 
has further corrected the character of the genus, especially noti- 
cing the adhesion of the filaments to the tube of the perigonium, 
and the two-cleft lobes of the limb of the latter, which are not 
‘deciduous,’ but involute after anthesis. 
QUAMOCLIDION, Chois. 
1. Quamocitipion oxyBarHoines (sp. nov.): caulibus procum- 
benti-diffusis gracilibus; foliis omnibus profunde cordatis longi 
uscule petiolatis, infimis reniformibus, superioribus acuminalls 
nunc subangulatis; involucro trifloro profunde 5-fido cum pedun- 
culis laxe paniculatis glanduloso-viscosissimo, lobis ovatis acu- 
tiusculis perigonio campanulato paullo brevioribus; staminibus 3; 
fructn subgloboso-obovoideo.—At the foot of mountains east © 
El Paso, in the shade of high rocks ( Wright, No. 596): also 
in mountain ravines of the Chiricahui Mountains, at Guadalupe 
Pass ( Wright, No. 1721 in part); Sept., Oct. In habit and foli- 
age this plant resembles Choisy’s Quamoclidion nyctagineum, 
except that it is more slender, and smaller in all its parts, and the 
leaves (from one to two inches in length and breadth) all have a 
reniform-cordate base. he involucre is very similar, except that 
the lobes are not acuminate, and scarcely acute; they are nl' 
3 lines long; those of Q. nyctagineum, said by Choisy to be 
lines in length, are twice that length in my original specimen. 
The few flowers seen of the present plant show a campannlsts 
perigonium, barely four lines long, with no tube, except the — 
ular base, and only three stamens. The fruit is smooth, destitu 
of ribs or angles, glabrous, blackish, and very obscurely rugulose- 
reticulated under a lens. Our plant is probably a congener le 
Choisy’s Q.? angulatum (if what was represented as a roultip 
stigma in Mocino and Sesse’s drawing be no more than t d 
coarsely granulated simple stigma of this and other species): 4? 7 
perhaps closely related to it; but the stamens are only ena 
apparently not “long exserted.” ‘Their number and the a 
and size of the perigohium would refer the species to OY 
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