204 BOTANICAL GAZETTE. [ December, 
1. A. Popei Torr. & Gray, Pacif. R. Rep. 2. 165. Abouta 
span high, angles, midribs, rays, pedicels, and ribs of fruit 
rough scabrous: leaf-segments narrowly linear: fruit ovate- 
oblong, 2 to 2} lines long, with thick corky commissure. 
Apium Popei Gray.—Texas (Wright, Parry, Reverchon). 
Fi. April, May. 
A. Butleri. Smaller, nearly glabrous: leaf-segments 
narrowly oblong or spatulate: fruit ovate, about a line long, — 
with ribs smooth or minutely scabrous, and corky commis- 
sure much less prominent (ligs. 115, 116). Apiwm Bullert 
Eng. Proc. Am. Acad. xxi. 453.—Texas (Hall, Reverchon 
Foor); Indian Territory (Bué/er). Fl. March, April. Dis- 
tributed in various collections as Apium Popei. 
APIUM Linn.—Fruit ovate or broader than long, flat- 
_ tened laterally: carpel with 5 prominent obtuse corky nearly 
equal ribs: pericarp with no strengthening cells: oil-ducts 
solitary in the narrow intervals, two on the commissural side: 
seed-section round: stylopodium depressed or wanting (tigs- 
117, 118).—Erect or prostrate herbs, with pinnately or tel 
nately divided leaves, umbels opposite the leaves, and white 
flowers. 
1, A. leptophyllum F, Muel., Benth. Fl. Austral. 3- 377: 
A few inches to two feet high: leaves ternately divided into 
filiform segments: umbels sessile or short-pedunculate: inne 
a line long. Helosciadium leptophyllum DC.—Flonda 
Texas and westward. March to June. ipo 
A. nodiforum Benth. & Hook. (Helosciadium nodiflorum — 
Koch), an introduced species, reported first by Walter around — 
Charleston, S. C., and not afterwards found, has been T 
cently collected by Dr. J. H. Mellichamp. It is also found — 
on the ballast grounds near Philadelphia by I. C. Martindale. — 
BIFORA Hoffm.—Fruit broader than long, flattend lat- 
erally, the two globose carpels connected only by a rare” 
commissure: carpel with primary ribs obsolete, and 4 9 
1. B. Americana Benth. & Hook. Gen. Pl. 1.926 “7. 
or more high, branching above, rays and angle of stem \* 
