discovered in Canada in the year 1819. 827 
Steilaria hngipes ; glaberrima, foliis lineari-lanceolatis, pedun- 
, culis terminalibus dichotome ramosis bracteatis, pedicellis lon- 
gis, petalis late obovatis bipartitis calyce obtuso trinervi vix 
longioribus. 
Hah. Woods near Lake Ontario. FI. June. 
Stem long, filiform, square, and, as well as the whole plant, 
quite glabrous. Leaves narrow, linear-lanceolate, patent. Per 
duncles branched in a dichotomous manner ; pedicels very long 
and slender, mth two ovate acute green bracteas, scariose at the 
margins. Flowers drooping before expansion. CalyxJeaves 
ovate, very obtuse, 3-nerved, margins scariose, scarcely shorter 
than the broad bipartite petals. 
This has quite the habit of a Micropetalum, and especially of 
M. lanceolatum^ but the calyx is remarkably obtuse, the styles 
are only three in number, and the petals are very broad and de- 
cidedly bipartite. 
Arenaria. 
Calyx pentaphyllus, patens. Petala quinque, integra. Cap- 
sula unilocularis, polysperma. 
Arenaria laterifiora ; foliis ovatis obtusis, pedunculo laterali bi- 
flora. 
A. lateriflora^ Willd. Sp. PI. v. ii. p. 718. Pursh, FI. Amer. 
Sept. V. i. p. 317. 
Hah. About Montreal. 
The stamens of this species have (although unnoticed by any 
author) all their filaments hairy ; five of them alternately short- 
er ; the longer ones considerably thickened. 
DECANDRIA PENTAGYNIA. 
Cerasttum. 
Calyx pentaphyllus. Petala bifida, aut marginata, passim In- 
tegra. Capsula unilocularis, apice dentatim dehiscens. 
(Stamina etiara 4-5.) 
Cerastium pubescens ; pubescenti-hirtum, caule deflexo-piloso, 
foliis lineari-lanceolatis intermediis longioribus, panicula ter- 
minali subquadrifiora, petalis acute emarginatis, calyce duplo 
longioribus. 
Hah. Stony beach near Kingston, Upper Canada. FI. June. 
Y 2 
