symmetrica, decidua. Stamina recepta- 
. culo inserta, decidua, in floribus apetalis 
. sepissime 3 (sepalis interioribus antepo- 
= sifa) v. nonnunquam 4—12, in floribus 
~ petaliferis 20—30. Filamenta capillaria, 
libera, Anthere adnate, basi affixæ, in 
floribus apetalis minimis obreniformes, v. 
subrotundæ apiceque emarginatæ, in flori- 
bus petaliferis ellipticæ; connectivum an- 
gustum, lineare. Ovarium liberum, mi- 
d nutum, subglobosum, 1-loculare ; placente 
ee 3, immediate parietales, filiformes, in flori- 
.. bus apetalis 1—2 v. 4-ovulatz, in petalife- 
.. Ti$ 4—12 ovulate ; funiculi infra medium 
: inserti (dum plures, per paria 
* H placentarum 
superposita) 
i 
" 
: l-valvis) abortu 1l-v. 3-sperma, aut raro 
E. (dum florum polyandrorum incrementum) 
: Polysperma ; endocarpium tenerrimum, di- 
, £ num, a mæsocarpio demum solutum; 
di sepalis interioribus anteposite, cym- 
somes, persistentes. conniventes, ante 
a. istentes, demum a 
“ms solute; nunc unica monosperma, 
ambeduæ vero alt 
eræ abortu asperme, nunc 
persistentes, 
iati, aut sæpius plus mi- 
» suberecti v. adscendentes, 
: Semina in quavis placenta 
V. gemina, v. raro plura, inversa 
quoad pericarpium vaga, or- 
parva, levigata v. subgranulosa, 
pellucida, ovata, obtusa, facie pla- 
convexa; integumentum tenue, 
am = isset terminalis, punc- 
formis um cum chalaza confluens in 
as: a " . 
ilarem ; Perispermium corne- 
* 
obscure 
" 
DESCRIPTION OF SOME NEW CISTACE.. 
291 
scendentes, planiuscule, oblongo-lineares, 
obtuse; radicula oblique adscendens, 
gracilis, cylindrica, obtusa, cotyledonibus 
paulo brevior.—Fruticuli (Americani) fo- 
liis sparsis, exstipulatis, breve petiolatis, 
integerrimis. Pubes stellato-tomentosa. 
Ramuli floriferi axillares terminalesque v. 
subterminales, nudi v. subfoliosi, trichoto- 
mi v. subdichotomi ; pedicelli cymosi v. 
subcorymbosi, v. fasciculati ; nonnunquam 
brevissimi, sepissime basi l-bracteolati. 
Florum evolutio centrifuga. Petala (dum 
adsint) lutea, 
This genus is very remarkable, from the 
striking differences of size and conforma- 
tion, exhibited by the flowers of each in- 
dividual specimen. Besides the species 
hereafter described, the above character 
applies to Zelianthemum ramuliflorum, 
Michx.! (Heteromeris Michauzit, nob.), 
and H. corymbosum, Michx. (Heteromeris 
cymosa, nob.). Iam not acquainted with 
Helianthemum rosmarinifolium (Pursh 
and Elliott), but though the description of 
the plant given by these authors is exceed- 
ingly short, I am rather inclined to believe 
it may also prove a Heteromeris. 
HETEROMERIS POLIFOLIA. (nob.) 
H. polifolia, suffruticosa ramosa erecta 
pube stellata scabriuscula, foliis lanceola- 
to-oblongis v. oblongo-linearibus v. subli- 
nearibus obtusis inferne attenuatis supra 
canescentibus subtus calycibusque incano- 
tomentosis, glomerulis axillaribus submul- 
tifloris subsessilibus, floribus apetalis 3- 
andris, placentis 1-ovulatis, floribus petali- 
feris sub 20-andris, placentis 4-ovulatis, 
capsulis globosis basi attenuatis, plerisque 
l-spermis. 
A suffrutescent plant, clothed nearly 
throughout with a more or less abundant 
stellate somewhat scabrous pubescence. 
Root slender, perpendicular, subligneous, 
scarcely branched. Stem six to twelve 
inches high, single, cylindrical, slender, 
erect, virgate, commonly branched in al- 
most its whole length (less frequently with- 
out any other ramifications than short fili- 
form axillary floriferous ramules), leafy, 
glabrous from the base to the distance of 
