Tv ARR 
- cotyledons thin, flat, elliptic, obtuse at both 
ends; nearly as broad as the diameter of 
the perisperm; radicle pointing to the 
apex of the seed, slender, straight, cylin- 
drical, obtuse, a little shorter than the co- 
tyledons. 
This species was found by Mr. Drum- 
mond in the Province of Texas (third col- 
lection, No. 19!, second collection, No. 
17!)—(v. s. spec. in herb. cl. Webb.) 
TJENIOSTEMA.! (nob.) 
. Calyz persistens, accrescens, profunde 
S-partitus, basi suburceolatus; sepala bise- 
rata, 2 exteriora minima, plana linearia, 
estivatione subdistantia ; 3 interiora multo 
latiora, navicularia, ecarinata, estivatione et 
post anthesin imbricata, nunquam con- 
torta. Receptaculum in stipitem brevis- 
simum productum. Discus inconspicuus. 
Petala nulla. Stamina 8 sepalis interio- 
ribus opposita (raro 4 v. 5), stipitis apice 
n, decidua; filamenta complanata 
lineari-spathulata : anthere minime, fil 
mentis continue, suborbiculares,thecis con- 
£g 
V 
TAG ima, 
basi placentifera ; placente 3 filiformes, 
Svato-trigona, 1-locularis, 3-valvis, abortu 
Perma; endocarpium membranaceum, 
E a Mesocarpio demum sece- 
im Lee sepalis interioribus antepo- 
NL mies, persistentes, navicula- 
ins "cm rudimenta dissepimenti tener- 
phani basi placentiferi gerentes ; 
vente filiformes brevissime apice di- 
adscendentia, 
abortiens ge- 
Semina ovato- 
ns ta, obscure pellucida, or- 
name, alluding to the form of the stamens, is 
ved from Tæma, p; 
VOL. ty. 2 ribbon, and ¢Tnputey stamen, 
DESCRIPTION OF SOME NEW CISTACEA. 
239 
thotropa! arrecta; integumentum crus- 
taceum, tenue; mucropylus apicilaris, 
punctiformis; Alum cum chalaza con- 
fluens in areolam basilarem. Perisper- 
mium corneum. Embryo subcircinnatus, 
subcentralis, antitropus! pro seminis in- 
dole magnus: cotyledones lineari—oblonge, 
obtuse, subcomplanate, apice deorsum 
spectantes ; radicula supera, oblique ad- 
scendens, dorsalis, cylindrica, gracilis, ob- 
tusa, cotyledonibus fere equilonga. Planta 
herbacea pube stellata subtomentosa. Fo- 
lia sparsa, exstipulata, integerrima, breve 
petiolata. Pedunculi axillares termina- 
lesque brevissimi; pedicelli fasciculate, 
lores minimi, sepissime basi 1-bracteo- 
lati. 
This genus is distinguished from all the 
other Cistacee by the singular form of its 
stamens. Besides this character, it differs 
from Lechea (nob.) and Lechidium (nob.) 
by its basilar nearly rudimentary placentas, 
its circinnate embryo, and its apetalous 
owers. I am acquainted only with the 
following species. 
TJNIOSTEMA MICRANTHUM. (nob.) 
Lechea mexicana, Hort. Berol. 
Plant herbaceous, clothed (particularly 
in its younger parts) with a greyish stel- 
late tomentum. Stems four to six inches 
high, tufted, erect ? tortuous, very slender, 
irregularly ramous, leafy. Ramu: fili- 
form, more or less elongated, leafy, tortu- 
ous, commonly axillary, most of them flo- 
riferous. Leaves alternate, exstipulate, 
very entire, pubescent or tomentous on 
both their surfaces, oblong-spathulate, 
obtuse, mucronulate, nerved with pin- 
nate veins, tapering to a short narrow 
petiole; the cauline about six lines long 
and nearly two lines broad; the ramular 
about twice or thrice as small. owers 
very minute, disposed in axillary and ter- 
minal clusters (or sometimes solitary or 
subsolitary in the inferior axils) throughout 
nearly the whole length of the ramuli. 
Peduncles very short, solitary, simple or 
bifurcate, erect, bearing from three to 
about twelve flowers, or less, frequently 
one or two-flowered. Pedicels fasciculate 
T 
