34 DROSERACE.E. [Drosera. 



are smaller. Petals 5. Stigma capitate. Capsules 3-valved. 

 Name from ?}Xos, the sun, and avOo<s, a flower. The same as 

 Helianthus. Polyandria. Monogynia. 



1. H. vulgare, Gaert. Common Rock-rose. Shrubby, pro- 

 cumbent, stipuled; leaves opposite, ovate, or oblong, nearly 

 flat, green above ; racemes terminal, bracteated ; calyx of 

 5 sepals, the inner furrowed and scariose at the edge ; style 

 bent at the base, somewhat clavate at the apex ; seeds black. 

 Benth. Br. Fl. 1. p. 258,Cistus Helianthemum, Linn.E. Bot. 

 t, 1321. E. Fl. v. iii. p. 26. C. tomentosus, E. Bot. 2208. E. 

 Fl v. \u.p. 27. 



Limestone rocks, south isles of Arran. Cape Clear Island, southern 

 coast ; Mr. J. Drummond. Fl. July, Aug. 1? . 



ORD. 9. DROSERACE^E. D C. Sun-dew Family, 



Sepals 5, persistent, equal, with an imbricated aestivation, 

 Petals 5. Stamens distinct, marcescent, equal in number to the 

 petals and alternate with them, or 2, 3, or 4 times that number. 

 Anthers 2-celled, opening longitudinally. Ovary 1, sessile. 

 Styles 3 5, more or less combined. Capsule 1 3-celled, 3 5- 

 valved, bearing the seeds along the middle, or at the base of the 

 valves. Seeds sometimes furnished with an arillus. Embryo 

 straight, in the centre of a fleshy or cartilaginous albumen. 

 Radicle directed to the hilum. Delicate herbaceous plants, fre- 

 quently clothed with glandular hairs, and in the Droserae the leaves 

 and peduncles have a circinnate vernation. 



1. DROSERA. Linn. Sun-dew. 



Calyx 5-cleft. Petals 5. Capsules 1 -celled, 3-valved, many- 

 seeded. Herbaceous plants with leaves clothed with beautiful 

 glandular hairs. Name derived from fyoo-os, dew. The 

 glands exude a pellucid fluid, which makes this plant appear 

 as if it were covered with dew. In Latin, Ros-solis, the same 

 as the English Sun-dew. Pentandria. Hexagynia. 



1. D. rotundifolia, Linn. Round leaved Sun-dew. Leaves 

 radical, orbicular, spreading; petioles hairy; seeds chaffy. Br. 

 Fl. \. p. 148. E. FL v. il.p. 122. E. Bot. t. 867. 



Bogs and moist heathy grounds, frequent. Bog near the summit 

 of Howth, at the base of the Dublin mountains, and many other places. 

 Fl. July. 1. Leaves in all our species covered with red peduncu- 

 lated viscid glands, which retain insects. Scape two to five inches 

 high* glabrous. Flowers racemed, drooping-, small. Styles variable 

 in number. 



2. D. Iongifolia 9 Linn. Spathulate-leaved Sun-dew. Leaves 

 radical spathulate, very obtuse, erect, on long glabrous petioles ; 



