358 TRINIA. [CLASS V. ORDER II. 



cut, and irregularly serrated, the upper with linear segments; invo- 

 lucre of two or three linear segments; general and partial umbel of a 

 few very irregular rays. 



English Botany, 1. 228. English Flora, vol. ii. p. 60. Hooker, 

 British Flora, vol. i. p. 127. Lindley, Synopsis, p. 123. Sison 

 segetum, Linn. 



Hoot small, tapering. Stem erect, round, smooth, striated, from one 

 to two feet high, much branched, and spreading on all sides, tough 

 and wiry. Leaves mostly on the lower part of the stem, on long narrow 

 channeled footstalks, pinnated, leaflets nearly sessile, in opposite pairs, 

 ovate, or roundish oblong, lobed, cut and toothed, or serrated, some- 

 times they are large, ovate-lanceolate, with two distinct ovate lobes at 

 .the base, the upper leaves with mostly three linear segments. Umbels 

 terminal, compound, the general of from three to six rays, of irregular 

 lengths, partial of three to six short very irregular pedicles. General 

 involucre of about three linear segments, partial of three or four small 

 lanceolate segments, of unequal sizes. Flowers white or pinkish. 

 Calyx limb obsolete. Petals roundish, notched at the apex with an 

 elongated shortly incurved point. Stamens on short filaments. 

 Anthers roundish, ovate Styles very short, with a thickened fleshy at 

 length depressed base, crowning the fruit. Stigmas simple, obtuse. 

 Fruit ovate, the sides slightly compressed. Carpels with five pale 

 obtuse flliform ridges, the lateral ones forming the margins, nearly 

 united. Channels with single slender mlta. Albumen very convex, 

 almost conical at the back, flat in front. 



Habitat. Moist fields and meadows, especially on a calcareous soil ; 

 in the middle and southern parts of England. " Said to have been 

 found- in one of the Hebrides by the late Dr. Walker." 



Annual ; flowering in August. 



GENUS LII. TRI'NIA. HOPFM. Honewort. 



GEN. CHAR. Calyx limb an obsolete margin. Petals of the barren 

 plant lanceolate, with a narrow inflexed point, those of the fertile 

 ovate, with a short inflexed point. Fruit ovate, laterally com- 

 pressed. Carpels with five prominent filiform equal ridges, the 

 two lateral ones forming the margins. Channels with obscure 

 vittcc, but with a distinct channel under each ridge. Albumen 

 very convex at the back, plain in front. Involucre various. 

 Named in honour of Dr. C. B. Trinius, a learned Botanist of St. 

 Petersburgh, author of a Species Graminum, $-c. 

 1. T. glabcrri'ma, Hoffm. (1'ig. 422.) glabrou* Honcworl. Smooth 



