196 XXXIV. UMBELLIFERAE. [Apium. 



didymous ; commissure constricted ; primary ridges 5, filiform, equal, obtuse ; 

 vittae solitary between the ridges. Seed subterete. Carpophore simple ; styles 

 divergent. Annual or perennial herbs, glabrous. Leaves pinnately or ternately 

 divided. Umbels compound, terminal or lateral. Bracts and bracteoles many 

 or few. 



A small genus, distributed through the temperate or warmer regioiis, extending to Fuegia. 



Leaves pinnate ; leaflets toothed, cuneate below . . . . . , . . * A. graveolens. 



Leaves 3-foliolate or 2-3-pinnate. Umbels sessile . . . . . . . . 1. A. prostratum. 



Leaves dissected .. .. .. .. .. .. .. * A. leptophyllum. 



* A. graveolens, L. Biennial. Eoot fusiform. Stems erect, 2ft. -4ft. high or 

 more, crowded or furrowed. Leaves pinnate or 3-foliolate ; leaflets obovate or rhom- 

 boid, cuneate below, toothed or lobed, glossy. Umbels on slender peduncles or 

 sessile, often leaf - opposed, usually with 1 or 2 ternately - divided leaves beneath. 

 Bracteoles 0. Mowers small. Styles divergent. Fruits rounded ; ribs prominent. 



NORTH and SOUTH Islands : sparingly naturalised in many localities between Auckland and 

 Akaroa ; attaining over 6ft. in height in the Pelorus Sound. Celery. Dec, Jan. Europe, South 

 Africa, West Asia. 



L A. prostratum, Labill, Relat. i. 141; PI. Nov. Holl. i. 176, t. 103. 

 Root stout. Stems prostrate or suberect, 6in.— 24in. long, stout, grooved. 

 Leaves excessively variable, 2— 3-pinnate ; leaflets sessile or petioled, variously 

 lobed or cut, membranous or subcoriaceous. Umbels compound, axillary or 

 leaf -opposed, sessile; rays 3—12, iin.— Hin. long; pedicels iin. long. Invo- 

 lucral bracts 0. Carpels ovoid. Primary ribs prominent ; vittae obscure. — 

 A. australe, Thou., Fl. Trist. d'Acugn. 43 ; Hook, f., Fl. N.Z. i. 86; Handbk. 90; 

 Benth., Fl. Austr. i. 372. Petroselinum prostratum, DC, Prod. iv. 102 ; A. 

 Rich., Fl. Nouv.-Zel. 278 ; A. Cunn., Precurs. n. 503. Apium decumbens, a 

 sapidum, Banks and Sol. MSS. 



Var. fillforme (sp.), Hook., Ic. PI. t. 819. Stems slender, prostrate. Leaves 3-foliolate; 

 leaflets lobed or incised, rarely pinnate. Umbels smaller ; rays few, rarely 1 — A. filiforme, Hook, f., 

 PI. N.Z. i. 87; Handbk. 90. Petroselinum filiforme, A. Rich.,'p]. Nouv.-Zel. 278; A. Gunn., Precurs. 

 n. 504. Apiimi decumbens, R tenellum. Banks and Sol. MSS. 



Prom the KERMADBC Islands to STEWART Island: ooramon, littoral. Var. filiforme is 

 occasionally found inland. Wild celery. Dec. to Feb. Also in Australia, South Pacific Islands, 

 South America, South Africa, Tristan d'Acunha, and St. Paul's Island. 



*A. leptophyllum, F. Muell. ex Benth., Fl. Austr. iii. 372. Stems usually 

 slender, suberect or spreading, 6in.-12in. high. Leaves lin.-l|-in. long; petioles 

 slender, sheathing, 3-pinnate; the leaflets ternately dissected into many narrow- 

 linear-acute or muoronate segments. Umbels leaf-opposed, compound ; rays 1-3. 

 Involucral bracts 0. Pedicels short. Flowers white. Styles very short. Eibs turgid, 

 with a single oil-tube under each furrow. 



NORTH Island : naturalised in various localities from Mangonui to Wellington, but local. 

 SOUTH Island: Nelson. Nov. to March. Australia, Nortli and South America. 



* AMMI, Tourn. 

 Calyx-teeth 0. Petals emarginate; lobes unequal, irregular. Fruits laterally 

 compressed, ovate-oblong. Carpels 5-ribbed ; oil-canals 5. Annual or biennial herbs, 

 with erect or suberect stems, pinnate or pmnatisect leaves, compressed umbels, and 

 pinnate or pinnatifid involucres. 



