Lathyrus.] KXV. PAPILIONACEX. 127 
Russian Asia, and northern America. Dispersed over a few localities in 
England and Ireland, but only a very doubtful inhabitant of Scotland. 
Fl. summer. 
8. L.maritimus, Bigel. (fig. 294). Sea Pea.—A glabrous, rather 
stout, branching perennial, with a creeping rootstock, and sharply angular 
spreading stems about a foot long. Stipules broad and leaf-like, sagittate 
at the base, both sides nearly alike. Leaflets 5 or 6 pairs to each leaf, those 
next the stem often 2 inches long by 1 broad, the tendril simple or branched. 
Peduncles about the length of the leaves, with a raceme of 6 to 8 large 
flowers of a bluish-purple. Pod hairy, at least when young, 1 to 2 inches 
long. 
On gravelly seacoasts, in northern and Arctic Europe, Asia, and America, 
not extending southwards in Europe beyond the shores of Picardy. Occurs 
in a few localities on the coasts of southern and eastern England, of Shet- 
land, and of Kerry in Ireland. 7. summer. 
9, &. macrorrhizus. Wimm. (fig. 295). Tuberous Pea.—Rootstock 
perennial, forming small tubers; the annual stems glabrous, nearly erect, 
simple or nearly so, 6 inches to a foot high. Leaves without tendrils; the 
leafstalk ending in a fine point, or sometimes in a narrow leaflet; the 
leaflets usually 2 pairs, sometimes 3 or even 4 pairs, oblong-lanceolate or 
linear. Peduncles slender, bearing a loose raceme of 2 to 4 flowers of a 
bright reddish-purple. Pod glabrous, about 13 inches long. The whole 
plant dries black like the following species. Orobus tuberosus, Linn. 
In thickets and open woods, under hedges, etc , throughout Europe, ex- 
cept the extreme north. Abundant in Britain. Fl. spring and early 
summer. This and L. niger form part of the old genus Orobus, still kept 
up by many botanists, but only differing from ZLathyrus by the want of 
tendrils to the leaves. 
10. &. niger, Wimm. (fig. 296). Black Pea.—A glabrous perennial, 
always turning black in drying; the rootstock short and not tuberous ; 
the stems erect or ascending, branched, 1 to 2 feet high or even more. 
Stipules small and narrow. Leaflets 4 to 6 pairs to each leaf, ovate or 
elliptical, 6 lines to an inch long, the common stalk ending in a short 
point. Peduncles longer than the leaves, with a short raceme of 6 to 8 
flowers. Pod glabrous, near 2 inches long. 
In mountainous and rocky districts, throughout temperate Europe to 
the Caucasus, extending far into Scandinavia. In Britain, only known 
from two localities, in Perth and Forfar. Fl. summer. 
XXVI. ROSACEA. THE ROSE FAMILY. 
Herbs, shrubs, or trees, with alternate leaves, mostly 
toothed or divided, the stipules seldom wanting and often 
leaf-hke. Flowers in cymes, or solitary at the ends of the 
year’s shoots, or more rarely in lateral bunches or racemes. 
Sepals 4 or 5, united at the base into a lobed calyx, sometimes 
double and usually enclosing the ovary or adhering to it. 
Petals 4 or 5 or rarely none. Stamens usually indefinite in 
number, inserted with the petals on the calyx below its lobes. 
