382 DICECIA MONADELPHIA. [CL. XXII, 



sule of two globular lobes, two-celled. Seeds solitary, globu- 

 lar. Named after (the so-called god) Mercury. 455. 



1. M. perennis. Perennial Mercury. Stem simple ; leaves egg- 

 shaped, serrate, rough ; root creeping. Stems about a foot high, 



square, leafy at the upper part : flowers in axillar spikes : poison- 

 ous. Perennial : flowers in April and May : grows in bushy or 

 shady places, on banks, and by walls and hedges : common. Eng, 

 Bot. vol. xxvi. pi. 1872. Eng. FL vol. iv. p. 248. 1450. 



2. M. dnnua. Annual Mercury. Stem branched ; branches op- 

 posite, crossing each other ; leaves narrow egg-shaped, serrate, 



smooth ; root fibrous. Stem from six inches to a foot high, 



erect, bushy, smooth : flowers in axillar spikes : poisonous. An- 

 nual : flowers from June to September : grows in waste and cul- 

 tivated ground : not common. Eng. Bot. vol. viii. pi. 559. Eng. 

 Fl. vol. iv.p. 248. 1451. 



12. HYDKO'CHAKIS. FROG-BIT. 



Barren Flowers. Calyx deeply divided into three oblong, 

 equal segments, membranous at the edges. Petals three, round- 

 ish, undulated, much larger than the calyx. Filaments nine ? 

 awl-shaped, erect, in three rows, the middle row producing from 

 its base an awl-shaped beak, the two other rows connected at 

 the base and adhering to the beak j anthers two-lobed, below 

 the summits of the filaments. 



Fertile Flowers. Calyx and petals as above. Germen infe- 

 rior, roundish. Styles six, compressed, channelled, as long as 

 the calyx. Stigmas cleft, acute. Capsule nearly globular, 

 leathery, six-celled. Seeds numerous, roundish, minute. Name 

 from hydor, water, and chairo, to rejoice. 456. 



1. H. Morsus-rance. Common Frog-bit. Root of long slender 



fibres : leaves stalked, kidney-shaped, purplish beneath, floating : 

 flowers erect, large, white, yellow in the centre. Perennial : 

 flowers in July : grows in ditches, and slow streams : not com- 

 mon. Eng. Bot. vol. xii. pi. 808. Eng. Fl. vol. iv. p. 250. 1452. 



MONADELPHIA. 



13. JUNITERUS. JUNIPER. 



Barren Flowers. Catkin conical, with three or more rows of 

 whorled, imbricated, oval scales, three in each whorl, and one at 

 the end. Corolla none. Filaments in the terminal flower three, 

 awl-shaped, united at the base ; in the other flowers hardly per- 

 ceptible ; anthers three ; two-lobed, in the terminal flower dis- 

 tinct, in the others fixed to the base of the scale. 



Fertile Flowers. Calyx superior, with three very small per- 

 manent segments, united to the germen. Petals three, acute, 

 stiff, permanent. Germen roundish. Styles three, very short ; 

 stigmas simple. Berry roundish, with three small tubercles at 



