BUPLEURUM.] UMBELLIFEE^J. 169 



julate ; margins scarious. Fruit 

 vittse solitary. DISTRIB. From 



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

 minute, oblong ; ridges slender, smooth; vit 

 France southd. and eastd. 



8. TRIN'IA, Hoffmann. HONEWORT. 



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 intiexed point. Disk-lobes conical or depressed ; margins 

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

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

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

 vitta in each. Seed terete. DISTIUB. S. Europe and temp. Asia ; species 

 8. ETYM. Dr. Tvimus, a Russian botanist. 



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



Pwipinella dioica, Sm. P. glauea, 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. Male umbels depressed ; 

 female irregular, rays longer ; bract 3-?left or ; bracteoles 2-3, linear. 

 flowers minute. Fruit y 1 ^ in., ovoid; styles slender; segments of carpo- 

 phore flattened. DISTRIB. From Belgium southd. to Greece. 



9. A'PIUM, L. (and Heloscia! dium, 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-angled, primary ridges equal 

 prominent obtuse ; vittse solitary in the furrows. Seed subterete. DISTRIB. 

 Temp, and subtrop ; species 14. ETYM. obscure. 



SECTION 1. A'pium 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. Rank-scented. Hoot fusiform, biennial. 

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

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

 cled or sessile. Flowers greenish-white. Fruit T * ? in., roundish ; styles 

 short, recurved, divergent. DISTRIB. Europe, N. Africa, W. Asia, N .W. 

 India. 



SECTION 2. Heloscia'dium, Koch (gen.). Bracteoles many. Pct-aU 

 nearly straight. Aquatic or subaquatic. 



