UMBELLIFERJE. XLI. HELOSCIADIUM. XLII. DISCOPLEURA. XLIII. LEPTOCAULIS. 



283 



Crowfoot-leaved Helosciadium. PI. 1 foot ? 



10 H. TE'NERUM (D. C. prod. 4. p. 105.) plant glabrous, 

 erect ; leaves bipinnate : leaflets tripartite : lobes obovate, ob- 

 tuse, small; umbels rising from the axils, pedunculate, 4-5- 

 rayed, without any involucrum. Native of Nipaul, on the high 

 mountain of Sheopore. Sison? tener, Wall. mss. Herb 6-8 inches 

 high. Sheath of petioles dilated and membranous. Fruit small, 

 ovate, glabrous in the immature specimen. Styles very short. 



Tender Helosciadium. PI. foot. 



11 H.? Ru'iA(D. C. prod. 4. p. 106.) stem multiple, diffuse; 

 leaves biternate : lower ones on long petioles : lobes oval, con- 

 fluent a great way, obtuse : upper leaves on short petioles, with 

 oblong lobes; umbels opposite the leaves, sessile, 3-5 -rayed: 

 rays elongated. Native of the Cape of Good Hope. Sium forte 

 Africanum foliis trifidis seu Rutae hortensis Oldenl. herb. Sison 

 trifidum, Burm. herb. Sison Rilta, Burm. fl. cap. p. 7. A 

 rather doubtful species, but from the immature fruit it appears to 

 belong to this genus. 



TZue-leaved Helosciadium. PI. diffuse. 



12 H. HEYNEA'NUM (D. C. prod. 4. p. 106.) stem nearly 

 simple, erect ; leaves on long petioles, ternate ; leaflets petiolate, 

 lanceolate, acuminated, deeply toothed ; umbels on long pedun- 

 cles, opposite, with 5-6 elongated rays ; and the umbellules 5-8- 

 flowered. . H. Native of the East Indies, but in what place 

 is unknown. Pimpinella Heyneana, Wall. mss. Mature fruit 

 not seen. Allied to the following section, but differs in the fruit 

 being glabrous while young. 



Heyne's Helosciadium. PI. 1 foot. 



SECT. III. TRACHYSCIA'DIUM (from rpa-^vy, trachys, rough, 

 and irKiaSiov, skiadion, an umbel ; in reference to the rough fruit 

 of the species). D. C. prod. 4. p. 106. Both involucra and in- 

 volucels are wanting. Fruit rough from short stiff hairs. 



13 H. TRIFOLIA V TUM (D. C. prod. 4. p. 106.) stem glabrous, 

 branched, erect : lower leaves 3-5-parted, the rest ternate : 

 leaflets nearly sessile, ovate-lanceolate, smooth above, but sca- 

 brous from pili along the nerves beneath, deeply toothed : teeth 

 mucronate ; fruit ovate, scabrous from rigid pili Native of 

 Nipaul, on the higher mountains about Gosaingsthan. Pimpi- 

 nella ? trifoliata, Wall. mss. Umbels terminal, and opposite the 

 leaves, 6-8-rayed. Styles very short. Fruit rather didymous. 



Trifoliate flelosciadium. PI. 



14 H. PUBE'SCENS (D. C. prod. 4. p. 106.) stem erect, mul- 

 tiple, pubescent, as well as the petioles, rays of umbel, and un- 

 der side of leaves : lower leaves ternate : leaflets ovate, toothed, 

 stalked : upper leaves on long petioles, ovate-cordate, toothed, 

 rarely cut ; ffuit scabrous. Native of Kamaon, in the East 

 Indies. Pimpinella pubescens, Wall. mss. Very like the pre- 

 ceding, but differs in the pubescence and structure of the leaves. 

 The immature fruit has only been seen. 



Pubescent Helosciadium. PL 



Cult. Those species belonging to the first section of the 

 genus being aquatic perennial plants, should be grown in ponds 

 of water ; the rest being annual, the seeds of them should be 

 sown in any.warm situation. 



XLII. DISCOPLEITRA (from SIITKOS, diskos, a disk, and 

 5r\upa, pleura, a rib ; the 2 lateral nerves of the fruit form a 

 disk on both sides of the fruit). D. C. coll. mem. 5. p. 38. t. 8. 

 and 9. prod. 4. p. 106. A'mmi species of Michx. Ell. &c. 



LIN. SYST. Pentdndria, Digynia. Calycine teeth 5, subulate, 

 permanent (f. 61. e.). Petals ovate, entire, each furnished with 

 a replicate point (f. 61./.). Fruit ovate (f. 61. c.), rather didy- 

 mous ; mericarps with 5 ribs ; the 3 dorsal ones filiform, exsert- 



FIG. 61. 



ed, and acutish : the 2 lateral ones rather concrete, with the thick 

 accessory margin, forming a broad disk on both sides of the 

 fruit : having the furrows between the ribs furnished with one 

 vitta each ; carpophore bifid. Seed nearly terete. Smooth 

 North American herbs. Stems terete. Leaves compound ; leaf- 

 lets linear-setaceous, some trifid, and others entire. Leaves of 

 involucel few, linear-setaceous. Flowers white. A genus of 

 elegant plants. 



1 D. CAPILLA'CEA (D. C. 1. c. 

 t. 8. A.) plant erect or procum- 

 bent ; umbels 3-10-rayed; leaf- 

 lets of involucrum 3-5, nearly all 

 trifid. O- W. H. Native of 

 North America, from Carolina to 

 New York, in humid places ; and 

 of North California. A'mmi ma- 

 jus, Walt. fl. carol. 6. p. 113. but 

 not of Lin. A'mmi capillaceum, 

 Spreng. in Schultes, syst. 6. p. 

 411. exclusive of the synonyme 

 of Nutt. and Pers. ex Torrey, fl. 

 un. st. 1. p. 306. .lEthusa capil- 

 lacea, Nutt. in herb. Mercier. 

 Flowers white, (f. 61.) 



Far. ft ? coslata (D. C. 1. c. t. 

 8. ft,) plant large, erect ; stem 



simple below ; segments of the leaves somewhat verticillate ; in- 

 volucrum of 10 or 12 leaves ; fruit deeply furrowed. O- W. H. 

 Native of Georgia, in marshes on the banks of the river 

 Ogeechee. A'mmi costatum, Ell. sketch. 1. p. 350. Said to 

 be nearly allied to the species, but differs according to Elliot, in 

 the plant being of taller stature, 4-5 feet high, not 1 or 2 feet 

 high, as in the species, and in the time of flowering, which is in 

 autumn, and not in the spring, and in the leaves of the involucel 

 being equal in length to the umbellules. 



Capillary-]eaved Discopleura. PI. 1 to 2 feet. 



2 D. NUTTA'LLII (D. C. 1. c. t. 9.) plant erect ; umbels 20- 

 rayed ; leaves of involucrum 5-6, and for the most part undi- 

 vided ; involucels of 5 leaves, about equal in length to the um- 

 bellules. O- H. Native of North America, at the Red river. 

 Cicuta capillacea, Nutt. in litt. 1825. Fibres of roots in fas- 

 cicles. Stem simple at the base, 1-2 feet high. Involucrum 

 deflexed. 



Nuttalts Discopleura. PI. 1 to 2 feet. 

 Cult. The seeds only require to be sown early in spring in 

 the open border. 



XLIII. LEPTOCAU'LIS (from KCTTTOE, leptos, slender, and 

 KavXoe, kaulos, a stem ; slender stems). Nutt. in litt. 1825. D. C. 

 coll. mem. 5. p. 39. t. 10. prod. 4. p. 107. 



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

 Petals elliptic, entire. Styles permanent, short. Fruit com- 

 pressed from the sides, ovate ; mericarps with 5 hardly prominent 

 ribs : having one vitta in each furrow between the ribs. Seed 

 convex on the outside, and flattish on the inside ; carpophore 

 bifid at the apex Glabrous, slender, smooth, erect North Ame- 

 rican annual herbs. Stems terete. Leaves multifid ; leaflets 

 linear. Umbels pedunculate, opposite the leaves, and terminal, 

 with few rays, destitute of involucra : rays of umbellules 

 few and unequal ; involucels short, few-leaved. Flowers small, 

 white. 



1. Fruit neither scabrous nor echinated. 



1 L. INE'RMIS (Nutt. in litt. ex D. C. prod. 4. p. 107.) fruit 

 o o 2 



