182 OCTANDRIA MONOGTNIA. [CL. VIII. 



Order III. TRIGYNIA. Three Pistils. 



10. POLY'GONUM. Calyx divided into five deep segments, coloured, 



inferior. Corolla none. Seed one, naked. 



Order IV. TETRAGYNIA. Four Pistils. 



12. ADO'XA. Calyx half-inferior. Corolla divided into four or five 



segments. Berry four or five-celled. 



11. PA'RIS. Calyx four-leaved. Petals four, awl-shaped. Berry 



four-celled. 



13. ELA'TINE. Calyx four-leaved. Petalt four. Capsule superior, 



four-celled. 



(Sagina. Rhodiola.) 



OCTANDRIA. MONOGYNIA. 



1. (ENOTHE'RA. EVENING PRIMROSE. 



Calyx superior, of one leaf, deciduous ; tube cylindrical, limb 

 deeply divided into four oblong segments. Petals four, inversely 

 heart-shaped, attached to the summit of the tube of the calyx, and 

 as long as the limb. Filaments awl-shaped, incurved, shorter than 

 the petals ; anthers oblong. Gennen inferior, oblong, furrowed. 

 Stigma divided into four obtuse, spreading segments. Capsule 

 oblong, bluntly quadrangular, four-celled, four-valved. Seeds 

 numerous, angular, beardless. Name from oinos, wine, and thera, 

 catching, the root having the odour of wine. 207. 



1. OS. bien'nis. Common Evening Primrose. Leaves between egg- 

 shaped and lance-shaped, flat ; stem rough, somewhat hairy ; petals un- 

 divided.-^ ^tem two or three feet high, leafy, angular : leaves alternate, 

 acute, toothed, downy : flowers numerous, bright-yellow, in terminal 

 spikes. Biennial : flowers in July, August, and September : grows on 

 sand-banks, on the west coast of England ; also in corn-fields : an Ameri- 

 can species naturalized. Eng. Bot. vol. xxi. pi. 1534. Eng. Ft. vol. ii. 

 p. 211. 579. 



2. EPILO'BIUM. WILLOW-HERB. 



Calyx superior, of one leaf, deeply divided into four oblong, 

 coloured, deciduous segments. Petals four, circular, broadest at 

 the outer part, notched, inserted between the segments of the 

 calyx. Filaments awl-shaped, four alternate ones shorter ; anthers 

 oval, compressed, obtuse. Germen inferior, cylindrical, very long. 

 Style thread-shaped; stigma thick, blunt, generally four-cleft. 

 Capsule quadrangular, very long, four-celled, four-valved ; parti- 

 tions opposite the valves. Seeds numerous, oblong, small, crowned 

 with down. Named from epi, upon, and lobos, a pod. 208. 



* Flowers irregular. 



1. E. angustifolium. Rose-bay Willow-herb. Leaves scattered, be- 

 tween linear and lance-shaped, veined, smooth ; petals unequal : sta- 



