CL. XVIII.] POLYADELPHIA POLYANDRIA. 301 



marked in the centre with an irregular dark spot : flowers yellow. An- 

 nual : flowers in May and June: grows in gravelly soil in the south 

 of England. -Eng. Bot. vol. xziii. pi. 1616. Eng. Fl. vol. Hi. p. 319. 



1091. 



4. M. minima. Little Bur Medick. Stalks many-flowered ; stipules 

 half egg-shaped, nearly entire ; leaflets inversely egg-shaped, hairy ; 



legumes globular, with two rows of hooked prickles. Prostrate and 



silky: flowers yellow. Annual : flowers in June and July : grows in sandy 

 fields in England : rare. Eng. Fl. vol. iii. p. 321. 1092. 



5. M. denticuldta. Reticulated Medick Stalks few-flowered ; stipules 

 laciniate ; leaflets inversely heart-shaped ; legumes broad, loosely spiral, 

 flat, reticulated, the margin keeled, with a double row of close-curved 



prickles. Annual : flowers from April to June : grows on the coasts 



of Kent and Norfolk : rare. Discovered by the Rev. G. E. Smith. 

 Eng. Bot. Suppl. pi. 2634. Brit. Fl. 4th ed. p. 280. 1093. 



CLASS XVIII. POLYADELPHIA. 



Filaments united, forming more than tvo sets. 



Order I. POLYANDRIA. Numerous Stamens. 



1. HYPE'RICUM. Calyx inferior, deeply divided into five seg- 

 ments. Petals five. Filaments united into three or five sets. Captnte 

 many-seeded. 



POLYADELPHIA. POLYANDRIA. 

 1. HYPE'RICUM. ST. JOHN'S-WORT. 



Calyx inferior, of one leaf, deeply divided into five nearly egg- 

 shaped, concave, permanent segments. Petals five, egg-shaped or 

 oblong, obtuse, expanding, overlapping each other laterally. Fila- 

 ments numerous, hair-like, united at the base into three or five 

 sets ; anthers small, roundish. Germen superior, egg-shaped. 

 Styles varying from five to one, simple, distant ; stigmas simple. 

 Capsule roundish, with as many cells as there are styles. Seeds 

 numerous. Name, hypericon of Dioscorides. 365. 



1. H.ealycinum. Large -flowered St. Jo/inVuwf. Styles five ; flowers 

 solitary ; stem woody, four-cornered, branched ; segments of the calyx 



inversely egg-shaped, obtuse ; leaves oblong. Root creeping : stems 



erect, twelve or eighteen inches high : leaves leathery, ever-green, very 

 shortly stalked : flowers golden-yellow. A shrub : flowers in July and 

 August : grows in bushy places : rare, and not indigenous. f-ng. Bot. 

 vol. xxix. pi. 2017. Eng. FL vol. iii. p. 323. 1094. 



2. H. Androsie'mum. Tutsan. Styles three ; capsule pulpy ; stem 



woody, compressed ; leaves egg-shaped, sessile. Two or three feet. 



high : flowers yellow, in terminal panicles : capsule purplish-black. A 

 shrub : flowers in July : grows in hedges and bushy places : rare in Eng- 



2 C 2 



