ONAGRACE^. 23 



ened with almost imperceptible tubercles. Plant sub-glabrous, rarely 

 somewhat pubescent with short curled hairs. 



In wet places, especially by the sides of rills on mountains, 

 apparently confined to those of the Scottish Ilighlands. I have 

 only collected it on the Brcadalbane Mountains in Perthshire, but 

 Professor Babington has seen it from Ben Wyvis, Boss-shire ; 

 Drumochter, Inverness-shire; Ben-na-buird, Braemar, Aberdeen- 

 shire ; and Clova, Porfarshire. 



Scotland. Perennial. Summer and Autumn. 



Extremely like E. anagallidifolium (if, indeed, it be distinct 

 from the plant so called), but generally smaller. The British 

 specimens which have passed through my hands have the stems 

 1 to 2 inches long, though I have Scandinavian ones 3 or 4 inches 

 in length. The stolons bear the same relation to those of E. 

 anagallidifolium, that those of E. tetragonum do to those of 

 E. obscurum. The leaves are more regularly elliptical than in the 

 preceding species, being broadest about the middle, and not 

 towards the base, as in E. anagallidifolium ; the lower leaves are 

 distinctly obovate. The flowers, pods, fruit-pedicels and seeds are 

 all similar, but the calyx-segments, and consequently the buds, are 

 more acute. The plant is generally tinged with red, particularly 

 towards the base, and it is said to be sometimes pubescent, but I 

 have only seen sub-glabrous specimens. 



Lesser Alpine Willow-herb. 



GBNVS 77.— CE N O T H E R A. Linn. 



Calyx-tube cylindrical, adhering to the ovary and prolonged 

 for a considerable distance above it ; limb divided to the base into 

 4 reflexed segments, which, as well as the part of the tube beyond 

 the ovary, separate circumcissily and fall off after flowering. 

 Petals 4. Stamens 8. Ovary 4-celled ; placentse in its axis ; ovules 

 numerous ; style filiform ; stigma 4-partite with linear segments 

 or capitate. Capsule 4-celled or 1-celled by the disappearance of 

 the dissepiments, 4-valved ; placentae either in the axis or cohering 

 with the dissepiments. Seeds numerous, without a tuft of hairs 

 at the chalaza, but sometimes with a slightly elevated ring at that 

 point. 



Herbs or under-shrubs, with alternate, entire toothed or pin- 

 natifid leaves, and axillary or terminal yellow white or pink 

 flowers, frequently opening in the evening and closing during the 

 day, often disposed in spikes. 



