12 TRIANDRIA — AIONOGYNIA. [Valeriana. 



k is of a (leop purple colour. Roofs numerous from a central point. 

 Tlie fructification of this species is a great desideratum. 



4. L. fjiLba, L. (gibbons Duckweed) ; fronds obovate nearly 

 plane above, liemisphauical beneath. E. Bat. t. 1233. 



Stagnant water, but not very frequent. Rare in Scotland. Fl. June 

 — Sept. ©. — Size of L. minor, but readily distinguished by its gibbous 

 or even homispiucrical lower surface, which is, moreover, white, pellucid, 

 and beautifully cellular, upper side plane, green, opaque. " Capsule 

 4-seeded. Seeds furrowed, not transversely placed, but with the hilum 

 towards the top of the capsule." Wilson. 



10. Cladiuim. Schrad. Twig- rush, 

 ^ 1. C. Marisciis, Br. (prickly Twig-rush); panicle much di- 

 vided leafy, spikelets capitato-conglotnerate, stem rounded leafy, 

 margins of the leaves and keel rough. E. Bot. t. 950, (Schcenus 

 3Iariscus, L.) 



Boggy and fenny places, in several parts of England, as in Norfolk, 

 Cambridge, Kent, &e. ; Cheshire. Plentiful in Galloway, Scotland. 

 Sutherlandshire, Dr Graham.— Fl. July, Aug. 11. —Plant 3— 3 feet 

 high, leafy. Leaves rough, almost prickly at the margin and keel. 

 Glianes ovate, brown, 6— 7 in an ovate spihelet ; inner ones the longest, 

 generally the two or sometimes three innermost ones are floriferous ; of 

 which one ("sometimes 2, more rarely all," Wilson) bears a coated 

 mit, almost as large as the spikelet. Stigmas generally two, sometimes 

 cloven. (Wilson.) 



DIANDRIA DIGYNIA. 

 11. Anthoxaxthum. Linn. Vernal-Grass. 



1. A. odordtum, L. (sweet-scented Vertial- Grass) ; panicle 

 spiked oblong, flowers upon partial stalks and longer than their 

 awns. E. Bot. t. 647. 



Meadows, woods, and pastures, abundant, often very alpine. Fl. 

 May, June. I4. . — A foot high, yielding an agreeable smeil in the act of 

 drymg, like that of Woodruff (Asperula odorata), and givin? the well- 

 known scent to new-made hay. Leaves short. Panicle compact, 

 spiked, yellow in age. Valves of the calyx very unequal : this calyx 

 J\Ir Brown justly considers as 3-flowered; and what are here called the 

 two outer valves of a double corolla, he looks upon as two imperfect 

 outer and lower flowers, each reduced to a single awned valve ; while 

 the two inner awnless valves belong to a central perfect flower. Sta- 

 mens only 2, in which particular it differs from all our other grasses. 

 Mr Wilson observes, that the germen is spurred at the base, and that 

 there is no scale there, as in most Gramineos. 



CLASS III. TRIANDRIA. 2> Stamens. 



ORD. I. MONOGYNIA. 1 Style. 



* Flowers superior. 



I. Valeriana. Cal. a thickened margin at the top of the ger- 

 men, at length unfolding into a feathery pappus. Cor. monope- 



