Hedcra.] VACCTNIE.E. 135 



§ Hederacea-. Ach. Rich. 



Corolla pohipetaloas. 



4. Cornus. Linn. Cornel. 



Calyx of four teeth. Petals four, superior. Nut of the drupe 

 with two cells and two seeds. — Name from Cornu, a Horn, 

 owing to the hard nature of the wood. 



Tetrandria. Monogynia. 



1. C. sanguinea, Linn. Wild Cornel or Dogwood. Branches 

 straight; leaves green on both sides ; cymes naked, flat. Br. 

 Fl.l.p.69. E. Fl. v. \.p. 221. E. Bot. t. 249. 



In crevices of limestone rocks, south Isles of Arran, truly wild. 

 Abundant in hedges below Coolock, scarcely indigenous. Fl. June, 

 July. F? . — Shrub three to four feet high. Branches dark red when 

 full grown. Wood hard. Petals white. 



5. Hedera. Linn. Ivy. 



Calyx of five teeth. Petals five, broadest at the base. Style 

 simple. Berry with 3 to 5 seeds, crowned by the calyx. — 

 Name of uncertain origin. Pentandria. Monogynia. 



1. H. Helix, Linn. Common Ivy. Leaves ovate, or cordate 

 and 5-lobed ; lobes angular; umbel erect. Br. Fl. 1. p. 109. 

 E. Fl. v. i. p. 334. E. Bot.t. 1267. 



Hedges, woods, old buildings, and on trunks of trees, frequent. Fl. 

 Oct. Nov. F? . — Stems very long, creeping, throwing out numerous 

 tufts of fibres, by which they adhere to hard substances. Leaves 

 shining, dark green, often veined with white lines. Flowers small, pale 

 green. Calyx-teeth very minute. Petals rerlexed. Berries smooth 

 and black. A variety called the Irish Ivy (of which I have speci- 

 mens collected by Mr. W. Andrews on the rocks at Ballybunian, 

 County of Kerry) is much cultivated on account of its very large leaves 

 and quick growth. Another fine variety, first found near Dunganstown 

 by Mr.Hodgens, and which I have since observed on walls near Merrion, 

 has the leaves deeply five-lobed, resembling those of Passiflora cce- 

 rulea or common Passion floiver. 



Ord, 36. VACCINIE/E. D C. Bilberry Family. 



Tube of the calyx adnate with the ovary, the limb entire or 

 4—5 — 6-lobed. Corolla monopetalous, 4— 6-lobed, inserted 

 along with the stamens, (which are twice as many as there are 

 lobes of the corolla,) upon an epigynous disk or torus : anthers 

 2-celled, with 2 horns. Ovary 1 : style 1 : stigma 1. Fruit a 

 berry, crowned with the persistent limb of the calyx, 4 — 5- 

 celled ; cells few-seeded. Embryo straight, in the axis of a 



