CL. V.] PENTANDRFA TRIGYNIA. 157 



irregular, the outer one largest, and the two inner smallest. Fila- 

 ments thread-shaped, longer than the corolla, spreading, a little 

 incurved ; anthers roundish. Germen egg-shaped, slightly com- 

 pressed transversely. Styles at first erect, rather short, afterwards 

 flattened, spreading, broad and pyramidal at the base; stigmas 

 obtuse, notched ; floral receptacle undulated, crenate, a little 

 broader than the base of the styles. Fruit inversely heart-shaped, 

 nearly flat, crowned with the floral receptacle and styles. Seeds 

 inversely heart-shaped, deeply notched at the top, and more or 

 less so at the base, with five ribs ; four intermediate coloured lines 

 in the interstices ; the border narrow, flat. Juncture close, flat, 

 nearly as broad as the seeds. Named after Hercules. 167. 



1. H. Sphondy'lium. Cow-parsnep. Hogweed. Leaves pinnate; 



leaflets pinnatifid, cut and serrate. Stem about four feet high, branched, 



furrowed, rough with spreading hairs. One of the most important of our 

 plants as food for domestic animals, although utterly neglected. The 

 stem is eaten in the Hebrides. Biennial : flowers in July : grows in 

 hedges, borders of fields and pastures: common. Eng. Bot. vol. xiv. 

 pi. 939. Eng. Ft. vol.ii. p. 102. 471. 



83. TORDY'LIUM. HARTWORT. 



Flowers separated, irregular, those of the circumference fertile. 

 Calyx of five unequal, awl-shaped teeth. Petals five : one of the 

 innermost flowers smallest, nearly equal and uniform, inversely 

 heart-shaped, with an inflected point; of the circumference of the 

 same form, the outermost largest. Filaments thread-shaped, spread- 

 ing. Anthers roundish. Germen egg-shaped, rugged or bristly, 

 transversely compressed. Styles thread-shaped, erect, swelled at 

 the base, afterwards spreading. Stigmas simple. Fruit nearly 

 round, transversely compressed, crowned with the tumid bases of 

 the styles. Seeds of the same form, indistinctly striated, sometimes 

 rough. Name used by the Greeks. 168. 



1. T. maximum. Great Hartwort. Leaflets lance-shaped, deeply ser- 

 rated ; flowers somewhat radiant, the outermost petal with equal lobes ; 



stem rough, with close deflected bristles. Stem three or four feet 



high: flowers reddish. Annual: flowers in June and July: grows in 

 waste ground, about London and Oxford : rare. Eng. Bot. vol. xvii. 

 pi. 1173. Eng. Ft. vol. ii. p. 105. 472. 



TRIGYNIA. 



84. VIBU'RNUM. GUELDER-ROSE. 



Calyx superior, minute, of one leaf, deeply divided into five 

 segments, permanent. Corolla of one petal, bell-shaped, with five 

 obtuse, spreading segments. Filaments awl-shaped, spreading, as 

 long as the corolla ; anthers roundish. Germen roundish. Style 

 none; stigmas three, sessile, obtuse. Berry roundish, one-celled. 

 Seed solitary, roundish, compressed. Name doubtful. 169. 



O 2 



