UMBELLIFER^l. XL. TRINIA. XLI. HELOSCIADIUM. 



281 



Leaves rather stiff. Umbels numerous, 12-14-rayed. (fig. 

 60.) 



Porto-Rico Wydleria. PI. 1 foot. 



Cult. A plant of easy culture, and only to be propagated by 

 seeds. 



XL. TRI'NIA (in honour of Dr. Trinuus, a celebrated Rus- 

 sian botanist, who has written on Gramineae). Hoffm. umb. gen. 

 p. 92. Bieb. suppl. 244. Koch, umb. p. 127. D. C. prod. 4. p. 

 103. Pimpinella species of Lin. Spreng. Lag. Apinella, Neck. 

 elem. no. 325. Spielmannia, Cuss. mss. ex Juss. diet. sc. nat. 

 55. p. 328. 



LIN. SYST. Pentandria, Digynia. Margin of calyx obsolete. 

 Flowers usually dioecious from abortion, rarely monoecious. 

 Petals of the male flowers lanceolate, ending in an involute seg- 

 ment ; those of the female or hermaphrodite flowers ovate, and 

 ending in a short inflexed point each. Fruit ovate, compressed 

 from the sides ; mericarps furnished with 5 filiform, rather pro- 

 minent equal ribs : lateral ones marginal ; having the furrows 

 between the ribs either without vittae, or with one in each furrow ; 

 carpophore flat, bipartite from the base. Seed gibbously convex, 

 flatfish in front. Much branched biennial herbs. Stems angu- 

 lar. Leaves bipinnate ; leaflets triternate ; lobes linear, pale 

 or glaucescent. Umbels numerous, of many rays, without any 

 involucrum, either disposed in a thyrse or panicle. Umbel- 

 lules usually naked, seldom furnished with an involucel, some- 

 times proliferous or somewhat racemose. Flowers white, dioe- 

 cious or polygamous. 



1 T. KITAIBE'LII (Bieb. suppl. p. 246. Koch, umb. 127.) 

 plant glabrous ; involucels 4-5-leaved ; ribs of fruit obtuse. 



$ . H. Native of Tauria and the south of Russia, Volhynia, 

 &c. Pimpinella glauca, Hoffm. umb. 18. Waldst. et Kit. pi. far. 

 hung. 1. t. 72. Seseli pumilum, Lin. spec. p. 378. Pimpi- 

 nella dichotoma, Lin. syst. p. 291. Spreng. syst. 1. p. 883.? 

 Flowers white. 



Kitaibel's Trinia. Fl. July, Aug. Clt. 1800. PI. 1 foot. 



2 T. VULGA V RIS (D. C. prod. 4. p. 103.) plant glabrous ; in- 

 volucels wanting or of one leaf; ribs of fruit obtuse ; lobes of 

 leaves linear, setaceous, very long. $. H. Native of Europe 

 and Caucasus, in exposed places. T. Henningii, Koch, umb. p. 

 127. Bieb. suppl. 245. Seseli montanum var. y Lapeyr. abr. 

 pyr. Pimpinella dioica, Bess, journ. galic. Pimpinella glauca, 

 Lin. spec. p. 378. Pimpinella multicaulis, Poir. suppl. 1. p. 684. 

 Seseli pumilum, Gouan. ill. 15. Flowers white. 



Common Trinia. Fl. June, Aug. Clt. 1803. PI. 1 foot. 



3 T. GLABE'RRIMA (Hoffm. umb. p. 93.) plant glabrous ; in- 

 volucels wanting or of one leaf; ribs of fruit obtuse ; leaflets 

 linear-lanceolate, short, equal. $ . H. Native of Western and 

 Central Europe, frequent. In England, on St. Vincent's rock 

 near Bristol, and at Uphill in Somersetshire. In Ireland near the 

 church at Athboy, county of Meath, in great quantities. Pimpi- 

 nella dioica, Lin. mant. p. 354. Smith, engl. hot. t. 1209. Seseli 

 glaiicum, Lam. fl. fr. 3. p. 436. Seseli pumilum, Lin. spec. 

 373. All. fl. pedem. Pimpinella glauca, Spreng. syst. 1. p. 883. 

 Pimpinella pumila, Jacq. hort. vind. t. 227. aust. 1. t. 28. Peuce- 

 danum minus, Huds. anyl. ed. 8. p. 101. Trinia vulgaris ft, 

 Jacquini, D. C. prod. 4. p. 103. Root tapering, fleshy. Herb 

 glaucous. Umbels paneled. Flowers cream-coloured. 



Var. ft, Dalechampii (D. C. prod. 4. p. 104. under T. vul- 

 garis,) lobes of leaves linear, short ; stem a finger in height ; 

 umbels numerous, many flowered. $ . H. Native of the king- 

 dom of Naples, and other parts of the south of Europe, in sterile 

 fields. Meum Dalechampii, Ten. prod. fl. neap. p. xix. 

 Dalech. hist. 1. p. 749. 



Quite-glabrous Trinia. Fl. June, July. Britain. PI. \ to 1 ft. 



4 T. RAMOSISSIMA (Fisch. ex Koch, in nov. act. bonn. 12. p. 



VOL. III. 



127.) germens glabrous ; ribs of mericarps very blunt, rounded ; 

 umbellules few flowered, furnished with involucels ; fruit bear- 

 ing pedicels much longer than the cremocarps. $ . H. Native 

 of Altaia, in plains at the river Irtysh near Krasnojarsk, and 

 elsewhere ; and about Buchtorminsk. It differs from T. Ki- 

 taibelii, in the involucels being present, and in the pedicels being 

 more slender and elongated. 



Much-branched Trinia. PI. -| foot. 



5 T. HOFFMA'NNI (Bieb. suppl. p 244.) plant glabrous ; in- 

 volucels wanting or of one leaf; ribs of fruit, especially the cari- 

 nal ones, acute. $ . H. Native of Russia and Tauria. Trinia 

 glaberrima var. Hoffm. umb. 93. Flowers whitish. 



Hoffmann's Trinia. Fl. June, July. PI. ^ to 1 foot. 



6 T. HI'SPIDA (Hoffm. umb. 94.) stem, leaves, and fruit pu- 

 berulous from short scattered down ; involucrum none, but when 

 present of only one leaf; ribs of fruit acute. $ . H. Native 

 of the south of Russia and Tauria, in dry desert places. T. 

 Hoffmanni var. ft, Bieb. suppl. p. 245. Pimpinella dioica Ros- 

 sica, Fisch. hort. gorenk. 1812. Pimpinella dioica, D'Urv. 

 enum. pi orient, p. 34. Perhaps only a variety of the preced- 

 ing. Flowers white. 



Hispid Trinia. PI. 1 foot. 



7 T. DUFOU'RII (D. C. prod. 4. p. 104.) stem and leaves 

 smoothish ; involucels almost wanting ; fruit puberulous, round- 

 ish, with obtuse ribs. $ . H. Native of Spain, near Tuclela. 

 Seseli dioicum, Dufour in litt. Pedicels after flowering time 

 very short, hardly longer than the fruit. The species of this 

 genus are very variable, and by no means easily distinguished. 



Dufour 's Trinia. PL 1 foot. 



Cult. A light sandy soil suits the species, in which the seeds 

 should be sown in spring. 



XLI. HELOSCIA'DIUM (from IXoc, helos, a marsh, and 

 oKtaSiov, skiadion, an umbel ; meaning an umbelliferous plant in- 

 habiting marshes). Koch, umb. p. 125. D. C. coll. mem. 5. p. 

 37. D. C. prod. 4. p. 104. Slum, Adans. fam. 2. p. 97. 

 Sium species of Lin. 



LIN. SYST. Pentandria, Digynia. Margin of calyx 5-toothed, 

 or obsolete. Petals ovate, entire, with a straight or inflexed apex. 

 Styles short. Fruit compressed from the sides, ovate or oblong ; 

 mericarps furnished with 5 equal, rather prominent filiform ribs, 

 lateral ribs marginating : having the furrows between the ribs 

 furnished with one vitta each ; carpophore entire, distinct. Seeds 

 gibbously or teretely convex, flattish in front. Herbs. Umbels 

 compound. Flowers white. Involucra variable in the dif- 

 ferent sections, which are probably genera. 



SECT. I. MAUCHA'RTIA (in honour of Burc. Dav. Mauchart, 

 author of Dissertationis Butyrum Cacao, 4to. Tubingen, 1735). 

 D. C. prod. 4. p. 104. Neck. elem. no. 286.? Common in- 

 volucra composed of from 1 to 3 leaves, rarely wanting ; in- 

 volucels of 5-6 leaves. Procumbent or creeping aquatic herbs, 

 with pinnate leaves. 



1 H. CRA'SSIPES (Koch, 1. c.) stems creeping at the base, as- 

 cending ; leaves pinnate : upper ones ternate ; leaflets obovate, 

 deeply toothed at the apex ; umbels 3-5-cleft, without any invo- 

 lucra; pedicels of umbellules stiff, a little thickened at the 

 base, and rather connate. If. . H. Native of Corsica, in watery 

 places about Bonifacio and Porto Vecchio ; and of Sardinia. 

 Reich, icon. bot. 3. p. 16. no. 365. t. 218. Sium limdsum, 

 Moris, in herb. Balb. Slum crassipes, Spreng. Lois. Flowers 

 white. 



Thick-pedicelled Helosciadium. PI. creeping 1 foot. 



2 H. NODIFLORUM (Koch, umb. p. 126.) stem rooting, pro- 

 cumbent, striated ; leaves pinnate ; leaflets oblong, equally ser- 

 rated ; umbels opposite the leaves, sessile or on short peduncles ; 

 involucra wanting or few-leaved, deciduous. 1 . W. H. Native 



Oo 



