UMBELLIFER^. (PARSLEY FAMILY.) 207 



21. CRYPTOTJENIA, DC. Honewort. 



Calyx-teeth obsolete. Fruit linear-oblong, glabrous, with obtuse equal ribs; 

 oil-tubes solitary in the intervals and beneath each rib ; stylopodium slender- 

 conical ; seed-face plane. — A glabrous perennial, with thin 3-foliolate leaves, 

 no involucre, involucels of minute bractlets or none, and white flowers. (Name 

 from KpuTTTos, hidden, and raivia, a Jillet, referring to the concealed oil-tubes.) 



1. C. Canadensis, DC. Plant 1-3° high, leaflets large, ovate (2-4' 

 long), pointed, doubly serrate, often lobed ; umbels irregular and unequally 

 few-rayed ; pedicels very unequal ; fruit 2 - 3" long, often becoming curved. — 

 N. Brunswick to Ga., west to Minn., E. Kan., and Tex. June -Sept. 



22. SiUM, Tourn. Water Parsnip. 



Calyx-teeth minute. Fruit ovate to oblong, glabrous, with prominent corky 

 nearly equal ribs ; oil-tubes 1 - 3 in the intervals ; stylopodium depressed ; 

 seed-face plane. — Smooth perennials, growiiig in water or wet places, with 

 pinnate leaves and serrate or pinnatifid leaflets, involucre and involucels of 

 numerous narrow bracts, and white flowers. (From aiov, the Greek name of 

 some marsh ]3lant.) 



1. S. CiCUtsefblium, Gmelin. Stout, 2-6° high; leaflets 3-8 pairs^ 

 linear to lanceolate, sharply serrate and mostly acuminate, 2-5' long (lower 

 leaves sometimes submersed and finely dissected, as in the next) ; fruit \^" 

 long, with prominent ribs. (S. lineare, Michx.) — Throughout N. America. 



2. S. Carsonii, Durand. Weak, 1-2° high; leaflets 1-3 pairs, linear, 

 sharply serrate, 1-2' long ; ichen submersed or floating, vert/ thin, ovate to oblong, 

 usualhj laciniately toothed or dissected, the leaf sometimes reduced to the ter- 

 minal leaflet; fruit about 1" long. — Mass., R. I., Conn., and Penu. 



23. BERULA, Koch. 



Calyx-teeth minute. Fruit nearly round, emarginate at base, glabrous ; 

 carpels nearly globose, with very slender inconspicuous ribs and thick corky 

 pericarp ; oil-tubes numerous and contiguous about the seed-cavity ; seed terete. 

 — Smooth aquatic perennial, with simply pinnate leaves and variously cut 

 leaflets, usually conspicuous involucre and involucels of narrow bracts, and 

 white flowers. (The Latin name of the Water-cress, of Celtic origin.) 



1. B. angUStifblia, Koch. Erect, ^-3° high, leaflets 5-9 pairs, linear 

 to oblong or ovate, serrate to cut-toothed, often laciniately lobed, sometimes 

 crenate (i-3' long); fruit scarcely 1" long. (Slum angustifolium, L.) — 

 Throughout the U. S. July, Aug. 



24. ZIZIA, Koch. 



Calyx-teeth prominent. Fruit ovate to oblong, glabrous, with filiform ribs ; 

 oil-tubes large and solitary in the broad intervals, and a small one in each rib ; 

 stylopodium wanting; seed terete. — Smooth perennials (1-3° high), with 

 mostly Thaspium-like leaves, no involucre, involucels of small bractlets, yellow 

 flowers, and the central fruit of each umbellet sessile. Flowering in early 

 spring in open prairies and upland meadow.s. (Named for /. B. Ziz, a Rhen- 

 ish botanist.) 



