104 TETRAKDRIA MONOGYNIA. [CL. IT. 



longer than the petals ; anthers roundish, fixed sidewise. Ger- 

 men inferior, roundish. Style thread-shaped, as long as the 

 corolla ; stigma obtuse. Drupe roundish, dimpled. Nut oblong 

 or heart-shaped, two-celled, with one kernel in each. Named 

 from cornu, a horn, the wood being hard. 75. 



1. C. sanauinea. Wild Cornel. Dog -wood. Woody; branches 

 straight ; leaves opposite, green on both sides ; cymes destitute of 

 involucre. A small tree or bush, five feet high : branches deep- 

 red: leaves opposite, stalked, egg-shaped, smooth, turning red in 

 autumn: flowers white, in terminal cymes: fruit dark- purple, 

 flowers in June : grows in hedges and thickets in England : frequent. 

 Eng. Bot. vol. iv. pi. 249. Eng. Fl. vol. i. p. 221. 256. 



2. C. Suecica. Dwarf Cornel. Herbaceous ; flowers umbellate, 

 surrounded by a four-leaved involucre, the umbel springing from 



the fork of the stem. Stems from four to six inches high, erect, 



leafy, forked ; flowers dark-purple, very small : leaves opposite, 

 elliptical. Perennial : flowers in June and July : grows in heathy 

 pastures, in Scotland and the north of England : frequent. Eng. 

 Bot. vol. v. pi. 310. Eng. Fl. vol. i. p. 221. 257. 



13. PAKIETA'RIA. PELLITORY. 



Calyx inferior, of one leaf, divided into four deep segments, 

 permanent. Corolla none. Filaments awl-shaped, longer than 

 the calyx, recurved ; anthers of two distinct lobes. Germen egg- 

 shaped. Style thread-shaped, erect; stigma knobbed. Seed 

 egg-shaped, flattened, invested with the enlarged calyx, 

 Named from paries, a wall. 76. 



1. P. officindlis. Common Pettitory of the Wall. Leaves between 

 egg-shaped and lance-shaped; involucre of many egg-shaped leaf- 

 lets. Root somewhat woody: stems branched, four-cornered, 



hairy, reddish : leaves alternate, stalked : flowers numerous, small, 

 axillar, growing in threes, the middle one pistilliferous only. Pe- 

 rennial : flowers through the summer ; grows on old walls and 

 among rubbish : common. This plant was formerly in repute as a 

 medicine, but it does not seem to possess any remarkable qualities. 

 Eng. Bot. vol. xiii. pi. 879. .Eng. Fl. vol. i. p. 222. 258. 



14. ISNA'RDIA. ISNARDIA. 



Calyx superior, bell-shaped, divided into four equal, egg- 

 shaped segments. Corolla none. Filaments awl-shaped, shorter 

 than the calyx ; anthers oblong, simple. Germen inferior, four- 

 cornered. Style cylindrical, long ; stigma knobbed. Capsule 

 four-cornered, oblong, four-celled, crowned with the calyx. 

 Seeds numerous, oblong. Named after Antoine cT Isnard, a 

 French botanist. 77. 



1. I. palustris. Marsh Isnardia. Roots long, thread-like : sterns 

 bluntly four-cornered, leafy : leaves opposite, stalked, egg-shaped, 

 bright green : two acute, small bracteas : flowers axillar, solitary, 

 sessile, green. Annual : flowers in July ; floating in pools : very- 

 rare. Found at Buxted, Sussex, by Mr. W. Borrer. Hampshire. 

 Jersey. Eng. Bot. Suppl pi. 2593. Eng. Fl. vol. i. p. 223. 259. 



