Part 72 (1/2)

18. EuLOPHUS, Nutt.

Calyx-teeth prominent. Fruit ovate or oblong, glabrous, with equal filiform ribs; oil-tubes 1--5 in the intervals; stylopodium conical, with long recurved styles; seed-face broadly concave, with a central longitudinal ridge.--Glabrous perennials (3--5 high) from deep-seated fascicled tubers, with pinnately or ternately compound leaves, involucels of numerous narrowly lanceolate ac.u.minate bractlets, and long-peduncled umbels of white flowers. (Name from e?, _well_, and ??f??, _a crest_,--not well applied to a plant with no crest at all.)

1. E. America.n.u.s, Nutt. Radical and lower stem-leaves large, 1--2-pinnately compound, with leaflets cut into short narrow segments; upper stem-leaves ternate, with narrowly linear elongated leaflets; fruit 2--3” long.--Ohio to Ill. and Mo., south to Tenn. and Ark. July.

19. ANTHRiSCUS, Hoffm. CHERVIL.

Calyx-teeth obsolete. Fruit linear, notched at base, long-beaked, glabrous, without ribs (but beak ribbed); oil-tubes none, stylopodium conical, seed-face sulcate.--Resembling _Chaerophyllum_ in vegetative characters. (The ancient Roman name.)

A. CEREFLIUM, Hoffm. Mature fruit smooth and s.h.i.+ning. (Chaerophyllum sativum, _L._)--Naturalized in E. Penn. (From Eu.)

20. BUPLEuRUM, L. THOROUGH-WAX.

Calyx-teeth obsolete. Fruit oblong, with very slender ribs, no oil-tubes, depressed stylopodium, and seed-face somewhat concave.--Smooth annual, with ovate perfoliate entire leaves, no involucre, involucels of 5 very conspicuous ovate mucronate bractlets, and yellow flowers. (Name from ???, _an ox_, and p?e????, _a rib_.)

B. ROTUNDIFLIUM, L., is very common in fields and cultivated ground, N. Y. to N. C., west to Mo. and Ark. (Nat. from Eu.)

21. CRYPTOTae'NIA, 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 ???pt??, _hidden_, and ta???a, _a fillet_, 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. SUM, 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, growing in water or wet places, with pinnate leaves and serrate or pinnatifid leaflets, involucre and involucels of numerous narrow bracts, and white flowers.

(From s???, the Greek name of some marsh plant.)

1. S. cicutaeflium, Gmelin. _Stout_, 2--6 high; _leaflets 3--8 pairs_, linear to lanceolate, sharply serrate and mostly ac.u.minate, _2--5'

long_ (lower leaves sometimes submersed and finely dissected, as in the next); _fruit 1” long_, with prominent ribs. (S. lineare, _Michx._)--Throughout N. America.

2. S. Carsnii, Durand. _Weak_, 1--2 high; _leaflets 1--3 pairs_, linear, sharply serrate, _1--2' long; when submersed or floating, very thin, ovate to oblong, usually laciniately toothed or dissected_, the leaf sometimes reduced to the terminal leaflet; _fruit about 1”

long_.--Ma.s.s., R. I., Conn., and Penn.

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. angustiflia, Koch. Erect, --3 high, leaflets 5--9 pairs, linear to oblong or ovate, serrate to cut-toothed, often laciniately lobed, sometimes crenate (--3' long); fruit scarcely 1” long. (Sium angustifolium, _L_.)--Throughout the U. S. July, Aug.

24. ZiZIA, Koch.