Bupleurum.] UMBELLIFERJE. 169 



the umbels, rigid ; nerves strongly reticulate ; margins scarious. Fruit 

 minute, oblong ; ridges slender, smooth ; vittse solitary— Distrib. From 

 France southd. and eastd. 



8. TRIN'IA, Hoffmann. Honewokt. 



Glabrous, branched herbs. Leaves pinnately compound. Umbels com- 

 pound, few-rayed ; bracts and bracteoles 1, 2, or ; flowers white, usually 

 dioecious, males with narrower petals Calyx-teeth or small. Petals 

 acute or with an inflexed point. Disk-lobes conical or depressed ; margins 

 undulate. Fruit broadly ovoid, laterally compressed or didymous ; com- 

 missure narrow, carpophore 2- partite ; carpels subterete or 5-angled, 

 primary ridges subequal, thick, smooth rugose or plaited,, with a large 

 vitta in each. Seed terete. — Distrib. S. Europe and temp. Asia ; specie* 

 8. — Etym. Dr. Trinius, a Russian botanist. 



T. vulga'ris, DC. ; glabrous, bracts or solitary, ridges smooth. 



Pimpinella dioica, Sm. P. glauca, L., in part. 



Limestone rocks, rare ; S. Devon, N. Somerset; fl. May-June.— Glaucous. 

 Root fusiform, biennial, fibrous at the top. Stem 3-6 in., branched from 

 the base, solid, stout, deeply grooved ; branches divaricate. Leaves spread- 

 ing, petiole and linear segments very slender. Mais umbels depressed ; 

 female irregular, rays longer; bract 3-cleft or 0; bracteoles 2-3, linear. 

 Flowers minute. Fruit ^ in., ovoid ; styles slender ; segments of carpo- 

 phore flattened. — Distrib. From Belgium southd. to Greece. 



9. A'PIUM, L. (and Heloscia' dmm, Koch). Celery. 



Annual or perennial, glabrous herbs. Leaves pinnate or 3-nately com- 

 pound. Umbels compound, often leaf-opposed, or in the forks ; bracts few 

 or ; bracteoles many or ; flowers white. Calyx-teeth 0. Petals entire, 

 acute, or with a short incurved point. Disk-lobes depressed or conical, 

 margins entire. Fruit broadly ovoid, laterally compressed ; commissure 

 constricted, carpophore simple ; carpels 5-ang'led, primary ridges equal 

 prominent obtuse ; vittse solitary in the furrows-. Seed subterete.. — Distrib. 

 Temp, and subtrop ; species 14. — Etym. obscure. 



Section 1. A'piuxn proper. Bracteoles 0. Petals much incurved. 



1. A. grave'olens, L. ; leaves pinnate or 3-foliolate. Wild Celery. 

 Marshy places, chiefly by the sea, from Perth and Argyll southd. ; Ireland ; 

 Channel Islands ; fl. June-Aug. — Rauk-scented. Root fusiform, biennial. 

 Stem 2 ft., erect, stout, grooved. Leaves 6-18 in. ; leaflet* |-1| in., cuneate 

 obovate or rhomboid, lower petioled, cut or lobed. Umbels shortly pedun- 

 cled or sessile. Flowers greenish-white. Fruit f e in., roundish ; styles 

 short, recurved, divergent. — Distrib. Europe, N. Africa, "W. Asia, N.W. 

 India. 



Section 2. Heloscia'dium, Koch (gen.). Bracteoles many. Petals 

 nearly straight. — Aquatic or subaquatic* 



