Villarsia.] PENTANDRIA — MONOGYNIA. 95 



lowing species. Not found in Ireland. Fl. June, July. V-. — One of 

 the most elegant of plants, scarcely yielding in beauty to the next spe- 

 cies. The powdery substance on the leaves, scape, and calyx, has a 

 musky smell. Flowers pale lilac-purple, with a yellow eye. 



5. P. Scotica, Hook, (^Scottish Primrose); leaves obov.ito-lan- 

 ceolate mealy denticulate, calyx ventricose, limb of the corolla 

 flat its mouth glandular, the segments broadly obcordate ap- 

 proximate " half the length of the tube. Hook, in FL Land. N. 

 S.t. 133, e^ m E. Bat. Siippl t. 5^608. 



North coast of Caithness, discovered by Mr W. Gihb of Inverness. 

 Frequent also on the north coast of Sutherland, and in the Orkney 

 islands; growing upon the sandy shores. FL July. 1|. — A most dis- 

 tinct and rare species of Primrose, not half the size of the preceding, 

 but with a stouter liabit. Floivcrs deep bluish-purple, with a yellow 

 eye. In P.farinosa, the germen is broadly obovate and the stiqma 

 capitate : here the germen is globose, and the stigma with 5 points. 

 Dr Graham first observed the difference in the relative length of the 

 segments of the corolla, a character which he thinks may be advantage- 

 ously employed in distinguishing other allied species of Primula. This 

 has no affinity with P. stricfa of Hornemann, to which Smith, though 

 doubtfully, referred it ; nor have I yet seen specimens from any country 

 save the north of Scotland. 



15. HoTToNiA. Lin7i. Water- "Violet. 



1. H. pahisiris, L. (^common Water- Violet or FeatherfoiV) ; 

 flowers whorled on a long solitary cylindrical stalk, corolla 

 longer than the calyx, leaves pectinated. E. Bot. t. 364. 



Ditches and pools in England : not found in Scotland. Downpatrick, 

 Ireland. Fl. June. 1^. — Hoot creeping. Leaves all submerged. Flowers 

 large, handsome, pale purple, rising above the water. 



16. Menyanthes. Lin7i. Buckbean. 



l.'M. trifolidta, L. {Buckbean or Marsh Trefoil). E.Bot.t.495. 



Marshy places, bos-gy ground, &c. frequent. Fl. June, July. If.. — 

 Moots densely creeping and matted, so as often to render the boggy 

 ground firm where the plant grows. Leaves ternate, stalked : leajiets 

 obovate, obscurely toothed. The base of the leaf is sheathing, whence 

 arises a Jloiverstalk supporting a compound raceme or thyrsus, of many 

 •vihxiQ flowers, tipped externally with red and beautifully fringed with 

 white filaments within. 



17. Villarsia. Vent. Villarsia. 



1. V. nymphceoides, Vent. (Nymphcea-like Villarsia) ; leaves 

 orbicular-cordate floating, peduncles aggregate single-flowered, 

 corollas ciliated. Hook, in Fl. Lond. N, S. t. 168. — Menyanthes, 

 Linn E. Bot. t. '217. 



Rare ; in rivers and still waters. In the Thames. Abundant in the 

 canal near Downham Market and Wisbeach. In Yorkshire. Fl. July, 

 Aug. If. — A beautiful plant, easy of cultivation, and difficult to be 

 eradicated. Flower large, yellow, curiously plaited. The canals in Hol- 

 land are sometimes covered with this plant, which has quite a different 

 habit from the true Menyanthes, Stigma 5-cleft. The r\\^e fruit I have 



