CL. IV.] TETRANDRIA. 95 



mas three, oblong, downy above. Capsule turbinate, one-celled, 

 three-valved. Seeds three, roundish. Named after Joseph de 

 Monti. 61. 



1. M. fontdna. Water Chickweed. Water Blinks. Root fibrous: 



stems succulent, two or three inches high, much branched : leaves op- 

 posite, egg-shaped: flowers small, white: seeds black, shining. Annual : 

 flowers in May : grows in springs, and by the sides of rivulets, forming 

 dense tufts : common. Eng. Bot. vol. xvii. pi. 1206. Eng. Fl. vol. i. 

 p. 187. 218. 



46. HOLO'STEUM. HOLOSTEUM. 



Calyx inferior, of five egg-shaped, permanent leaves. Petals 

 five, oblong, deciduous, jagged or toothed. Filaments three, hair- 

 like, shorter than the petals ; anthers roundish. Germen roundish. 

 Styles three, hair-like, short ; stigmas bluntish, downy. Capsule 

 nearly cylindrical, one-celled, splitting at the top into six teeth. 

 Seeds numerous, stalked, attached to a central receptacle. Named 

 from holos, all, and osteon, bone. 62. 



1. H. umbelldtum. Umbelliferous Mouse-ear, or Jagged Chickweed. 



Flowers in umbels ; leaves egg-shaped, acute. Root fibrous : stems 



four or five inches high, round, leafy : petals white, tinged with red. 

 Annual : flowers in April : grows on old walls : rare. About Norwich 

 and Bury. Eng. Bot. vol. i. pi. 27. Eng. Fl. vol. i, p. 188. 219. 



47. POLYCA'RPON. ALL-SEED. 



Calyx inferior, of five, egg-shaped, keeled, permanent leaves. 

 Petals five, shorter than the calyx, egg-shaped, notched at the end, 

 permanent. Filaments three, sometimes five, thread-shaped, half 

 the length of the calyx ; anthers roundish, two-lobed. Germen 

 egg-shaped. Styles three, short; stigmas blunt. Capsule egg- 

 shaped, one-celled, three-valved. Seeds numerous, egg-shaped, 

 nearly sessile on a central receptacle. Named from polus, many, 

 and carpos, seed. 63. 



1. P. tetraphy'ltnm. Four-leaved All-seed. Root tapering; steni 



much branched, lying flat on the ground ; leaves inversely egg-shaped, 

 smooth, stalked, in fours, one pair crossing the other : panicles terminal, 

 repeatedly forked : flowers greenish white. Annual : flowers throughout 

 the summer, grows on the sea-shore : rare. Southern counties of Eng- 

 land : Guernsey and Jersey. Eng. Bot. vol. xv. pi. 1031. Eng. Fl. 

 vol. i. p. 189. 220. 



CLASS IV. TETRANDRIA. 



Plants bearing Flowers with Four Stamens. 



Order I. MONOGYNIA. One Pistil. 

 * Flowers of one petal, superior, one-seeded. 



1. Dl'PSACUS. Involucre many-leaved. Calyx single, superior, of 



one leaf, cup-shaped, undivided, crowning the seed. 



2. SCABIO'SA. Involucre many-leaved. Calyx double, superior, 



variously cut, crowning the seed. 



