CLASS VIII. ORDER I.J liPILOBIUM. 647 



Stem erect, much branched, with two or four elevated lines ; leaves 

 opposite, petiolate, ovate lanceolate, uneciually serrated, the margins 

 and veins downy; flowers nearly sessile ; capsules on long peduncles; 

 stigmas club-shaped. 



English Botany, t. 69.3.— English Flora, vol. ii. p. 215.— Hooker, 

 British Flora, vol. i. p. 183. — Lindley, Synopsis, p. 180. 



Boot fibrous, branched. Sieni erect, from one to two feet high or 

 more, erect, round, with two or four elevated lines, smooth, or some- 

 what downy above, much branched, or only slightly so, and sometimes 

 simple, rarely hairy. Leaves numerous below, opposite, alternate 

 above, on slender footstalks, ovale lanceolate, or ovale oblong, with a 

 downy mid-rib and branched lateral veins, often of a pinkish colour, as 

 well as the stem, the margins irregularly serrated, sometimes almost 

 entire, and fringed with soft down. Inflorescence a terminal leafy 

 elongated corymb, of numerous flowers, of a pale pink, with darker 

 veins. Flowers nearly sessile, with a smooth or downy calyx, the limb 

 of four ovate acute segments. Petals half as long again as the calyx, 

 inversely heart-shaped. Stamens erect, on slender filaments. Style 

 longer than the stamens, with a club-shaped stigma. Capsidc on an 

 elongated peduncle, often as long as itself, smooth, or mostly covered 

 with a soft close down, obtusely four angled, furrowed, of four valves, 

 four celled, and many seeded, the seeds ovate, crowned with a tuft of 

 long silky hairs. 



Habitat. — About London, Essex, Sussex, and we have found it on 

 dry banks near Lincoln, and Mansfield, Nottinghamshire ; Forfarshire, 

 Scotland. — Mr. Drummond. 

 Perennial ; flowering in July. 



6. B. tetra' gonum, Linn. (Fig. C23.) Square-stalhed Willow herb. 

 Stem with four elevated lines, much branched, nearly smooth ; leaves 

 lanceolate, toothed, sessile, the lower ones opposite, and shortly petio- 

 lated ; stigmas club-shaped. 



English Botany, t. 1943. — English Flora, vol. ii. p. 215. — Hooker, 

 British Flora, vol. i. p. 183. — Lindley, Synopsis, p. 180. 



Boot fibrous, with somewhat creeping underground stems. Stem 

 erect, from one to two feet high, smooth below, slightly downy above, 

 almost square from four elevated lines, frequently pinkish, and very 

 much branched often from the base. Leaves numerous, the lower 

 ones opposite, the upper alternate, lanceolate, narrowed towards the 

 point and base, the lower ones with a short footstalk, the rest sessile, 

 slightly decurreut, smooth above, the mid-rib veins and margins on the 

 under side downy, the margins irregularly and distantly toothed. 

 Flowers few in the axils of the upper leaves, nearly sessile, the calyx 

 tube clothed with close pressed soft down, the limb of four lanceolate 

 downy pieces, the petals four, inversely heart-shaped, rather longer 

 than the calyx, pale rose colour. Stamens on slender s\m\}]e filaments, 

 with small roundish yellow anthers, of two cells. Style rather longer 



