382 DICECIA MONADELPHIA. [CL. XXII. 



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

 Named alter (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 : poisonous. 

 Perennial : flowers in April and May : grows in bushy or shady places, 

 on banks, and by walls and hedges : common. En". Bot. vol. xxvi 

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



2. M. dnnua. Annual Mercury. Stem branched ; branches opposite, 

 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. Annual: flowers from June to Sep- 

 tember: grows in waste and cultivated ground : not common. Eng. Bot. 

 vol. viii. pl.559. Eng. Ft. vol.iv. p. 248. 1451. 



12. HYDRO'CHARIS. FROG-BIT. 



Barren Flowers. Calyx deeply divided into three oblong, 

 equal segments, membranous at the edges. Petals three, roundish, 

 indulated, 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 ; anthers two-lobed, below the 

 summits of the filaments. 



Fertile Flowers. Calyx and petals as above. Germen inferior, 

 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. Aforsus-rflTUE. 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 common. Eng. Bot. vol. xii. pi. 808. 

 Eng. Fl. vol. iv. p. 250. 1452. 



MONADELPHIA. 



13. JUM'PERUS. JUNIPER. 



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

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

 the end. Corolla none. Fjhuuents 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 distinct, 

 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 its lower 



