. 409 
lets surely not acute, though pointed. Calyx-segments often 
very narrow, like mere points. Styles elongated, (after 
flowering,) spreading, scarcely reflexed. I see no strie on 
the half-ripe seeds, between the ribs, the spaces are very 
deep, but smooth; nor do I find one of the two seeds often 
abortive. 
14, Sium nodiflorum and repens.—Examined 27th Decem- 
ber, 1828.—J believe these to be mere varieties of one species.— 
In the herbarium of a friend, for whom I once collected spe- 
cimens, I find an example which will completely unite these 
two supposed species. The stem is erect, eighteen inches long, 
the lower leaves of three pairs of ovate, moderately acute, 
dentato-serrate Jeajlets, scarcely more than half an inch 
long, with the terminal one, in some cases, confluent with 
the upper pair. The upper leaves of the stem with three or 
five roundish, coarsely toothed leaflets, not different from 
those in Dr. Hooker's specimen of * Siwm repens," from Cor- 
sica. No general bracteas are present. Partial ones of a 
narrow ovate shape, reflexed, as long as the partial rays, 
3-ribbed, with slightly membranous margins. The umbel of 
four or five rays, is raised on a stalk, a quarter of an inch 
long, and fully half as long as the general rays. Styles, in 
the half-ripe fruit, horizontally spreading. Calyx obsolete. 
In the common state, Sium nodiflorum has the leaflets ovato- 
oblong, very acute, serrated, not deeply cut, an inch and a 
half long. The umbel of about twelve rays, on a short stalk 
about one-fourth the length of the rays. Without general 
bracteas. Partial ones of a narrow lanceolate shape, acute, 
3-ribbed, often twice as long as the partial rays, and without 
a membranous border. Dr. Hooker's Corsican specimen of 
` “ Sium repens" exactly agrees with numerous specimens 
gathered in Wales, and near Warrington, in which pe 
general bracteas are altogether wanting. Sium repens 
Engl. Fl. is described as having them, and I was hence 
led to consider my small creeping — ELA 
varieties of S. nodiflorum, an opinion which I am by no 
means yet inclined to alter. For I do not think the presence 
of genera] bracteas, unless it should provea constant character, 
