124 
and iiiosly acuminate, 2 to 5 inches lon^ (lower leaves sometimes 
submersed and finely dissected, as in the next): umbel many-rpyed; 
rays 1 to inches long; pedicels 1 to 3 lines long: fruit 1% lines 
long, with prominent ribs: oil-tubes 2 to 6 on the commissural 
side. (Fig. 143.)— 6*. linearo Michx. FI. i. 167. Apiuni Uneare 
Benth. & Hook. Gen. Plant, i. 888 and 893. 
Apparently throughout North America. 
The forms with submersed dissected leaves are from S. Illinois 
(Schneck), Wisconsin (Lapham), and Turtle Lake, Mt. Desert {Redfield). 
2. S. Carsonii Durand, Gray’s Manual, 196. Weak, 1 to 
2 feet high: leaflets 1 to 3 pairs, linear, sharply serrate, 1 to 2 inches 
long; when submersed or floating, very thin, ovate to oblong' 
usually laciniate-toothed or dissected, the leaf sometimes reduced 
to the terminal leaflet: umbel fewer (10 to 15)-rayed ; rays about 
an inch long; pedicels 1 to 3 lines long: fruit smaller, about a line 
long, with less prominent ribs: oil-tubes 2 to 4 on the commissural 
side. (Fig. 144 .) — Apium Carsonii Benth. & Hook. 1. c. 
Pennsylvania, Connecticut, Rhode Island, and Massachusetts. 
46, APIUM Linn. Gen. n. 367. — Erect or prostrate gla- 
brous herbs, with pinnately or ternately divided leaves, and umbels 
of white flowers opposite the leaves. 
1. A. leptophyllum F. Muel., Benth. FI. Austral, iii. 372. 
A few inches to two feet high: leaves ternately divided into 
filifoim segments: umbels sessile or short-pedunculate: fruit a 
line long. (Fig. 145 .) — Helosciadium leptophylhim DC. 
Florida to Texas, extending north to “St. Louis” (Nuttall), and south- 
westward into Mexico. A very much reduced form (2 to 3 inches high) was 
collected by Martindale near Long Branch, N. J., August, 18()4. 
A. NODiFLORUM Benth. & Hook., an introduced species from 
Euiope, veas reported first by Walter as very abundant around 
Chaileston, S. C., but was not afterwards found until recently col- 
lected by Di . J. H. Mellichamp. It has also been found on ballast 
neai Philadelpnia by Martindale. It grows in wet places, and 
has simply pinnate leaves, the leaflets being oblong and serrate. „ 
A. GKAVEOLENS L., the commoii garden celery, is a native 
of the coasts of Europe, but has become widely naturalized, being 
reported from California, in salt marshes from Santa Barbara to 
San Diego, also from San Bernardino (/VrA/^) and Ft. Tejon; 
