UMBELLIFERAE. XL. Trixia. 
Leaves rather stiff. Umbels numerous, 12-14-rayed. (fig. 
60. 
Porto-Rico Wydleria. Pl. 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 Graminez). Hoffm. umb. gen. 
p. 92. Bieb. suppl. 244. Koch, umb. p. 127. D. C. prod. 4. p. 
103.—Pimpinélla species of Lin. Spreng. Lag.—Apinélla, Neck. 
elem. no. 325.—Spielmannia, Cuss. mss. ex Juss. dict. sc. nat. 
55. p. 328. 
Lin. syst. Pentdndria, 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- 
mment equal ribs: lateral ones marginal; having the furrows 
between the ribs either without vittee, or with one in each furrow ; 
carpophore flat, bipartite from the base. Seed gibbously convex, 
flattish 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. Krrarse'tn (Bieb. suppl. p. 246. Koch, umb. 127.) 
Plant glabrous ; involucels 4-5-leaved; ribs of fruit obtuse. 
ONE H. Native of Tauria and the south of Russia, Volhynia, 
&c. Pimpinélla glaúca, Hoffm. umb. 18. Waldst. et Kit. pl. rar. 
hung. 1. ‘t. 72. Séseli pùmilum, Lin. spec. p. 378. Pimpi- 
nélla dichótoma, Lin. syst. p- 291. Spreng. syst. 1. p. 883. ? 
lowers white. 
Kitaibel’s Trinia. Fl. July, Aug. Clt. 1800. Pl. 1 foot. 
2 T. vurca`rıs (D. C. prod. 4. p. 103.) plant glabrous; in- 
volucels wanting or of one leaf; ribs of fruit obtuse ; lobes of 
eaves linear, setaceous, very long. &. H. Native of Europe 
and Caucasus, in exposed places. T. Henníngii, Koch, umb. p. 
127, Bieb. suppl. 245. Séseli montànum var. y, Lapeyr. abr. 
Pyr. Pimpinélla dioica, Bess. journ. galic. Pimpinélla glaúca, 
Lin. spec. p. 378. Pimpinélla multicaúlis, Poir. suppl. 1. p. 684. 
seli pùmilum, Gouan. ill. 15. Flowers white. 
Common Trinia. FI. June, Aug. Clt. 1803. Pl. 1 foot. 
3 T. GLABE/RRIMA (Hoffm. umb. p. 93.) plant glabrous ; in- 
volucels wanting or of one leaf; ribs of fruit obtuse; leaflets 
Inear-lanceolate, short, equal. ¢.H. Native of Western and 
entral 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- 
es dioica, Lin: mant. p. 354, Smith, engl. bot. t. 1209. Séseli 
gaúcum, Lam. fl. fr. 3. p. 436. Séseli pùmilum, Lin. spec. 
<ia All. fi. pedem. Pimpinélla glaúca, Spreng. syst. 1. p. 883. 
mpinélla pumila, Jacq. hort. vind. t. 227. aust. 1. t. 28. Peucé- 
iy minus, Huds. angl. ed. 8. p. 101. Trinia vulgaris £, 
aequini, D. C. prod. 4. p. 103. Root tapering, fleshy. Herb 
8laucous. Umbels panicled. Flowers cream-coloured. 
Var. B, Dalechámpii (D. C. prod. 4. p. 104. under T. vul- 
84ris,) lobes of leaves linear, short; stem a finger in height ; 
umbels numerous, many flowered. ¢.H. Native of the king- 
Geld of Naples, and other parts of the south of Europe, in sterile 
D, s. Mèum Dalechámpii, Ten. prod. fl. neap. p. xix.— 
alech. hist. 1. p. 749. 
Quite-glabrous Trinia. Fl. J une, July. Britain, Pl. } tol ft. 
+ Ramosissima (Fisch. ex Koch, in nov. act. bonn. 12. p. 
VOL. T. 
XLI. Hexoscrapium. 281 
127.) germens glabrous; ribs of mericarps very blunt, rounded ; 
umbellules few flowered, furnished with involucels; fruit bear- 
ing pedicels much longer than the cremocarps. g.H. Native 
of Altaia, in plains at the river Irtysh near Krasnojarsk, and 
elsewhere ; and about Buchtorminsk. It differs from T. Ki- 
taibélii, in the involucels being present, and in the pedicels being 
more slender and elongated. 
Much-branched Trinia. Pl. 4 foot. 
5 T. Hovrma’nynt (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. Trínia 
glabérrima var. Hoffm. umb. 93. Flowers whitish. 
Hoffmann’s Trinia. Fl. June, July. Pl. 4 to 1 foot. 
6 T. ur'sripa (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. 
Hoffmánni var. 8, Bieb. suppl. p. 245. Pimpinélla dioica Rós- 
sica, Fisch. hort. gorenk. 1812. Pimpinélla dioica, D’Urv. 
enum. pl. orient. p. 34. Perhaps only a variety of the preced- 
ing. Flowers white. 
Hispid Trinia. PJ. 1 foot. 
7 T. Durov‘ (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 Tudela. 
Séseli 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. PI. 1 foot. 
‘ult. A light sandy soil suits the species, in which the seeds 
should be sown in spring. 
XLI. HELOSCIA‘DIUM (from évoc, helos, a marsh, and 
axtactoy, 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.—Sium, Adans. fam. 2. p. 97.— 
Sìum species of Lin. 
Lin. syst. Pentándria, Digýnia. 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. 
Secr. I. Maucwa’atia (in honour of Bure. 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, 1l. 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. %.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 limòsum, 
Moris. in herb. Balb. Sium crdssipes, Spreng. Lois. Flowers 
white. 
Thick-pedicelled Helosciadium. PI. creeping 1 foot. 
2 H. nopiridrum (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. 4. W.H. Native 
Oo 
