146 ARALIACEAE. [Caucalis. 
compressed on the back, with 5 primary slender bristly ribs, 2 of them 
on the inner face, and besides with 4 equal, more or less winged, secon- 
dary ribs, each bearing a single row of larger barbed prickles; oil-tube 
1 under each secondary rib. Seed flat on the inner face. — Biennial 
herbs with finely 2—3-pinnate or sla adis ass leaves, foliaceous involucres 
and compound concave umbels. 
¢ poms 30 species, chiefly natives of the Old World, one of them the common Carrot, 
1. D. pusillus, Michx. Fl. Bor. Amer. I, 164. — Stem about 1 ft. 
high, retrorsely hispid. Leaves hispid, 3 or 4 times pinnatisect, the 
sae anes linear- scbaeitia acute, Involucre leaf-like, equalling 
ays 6—9"; raylets 3”. Bracts of involucel linear or 
nada ialling the wtiete Petals creamcolored. Fruit 1'/2—2” long, 
the bhebed prickles equalling or exceeding the width of the fruit, the 
bristles of the primary ribs much shorter and in two rows. — Gray, Bot. 
U.S. E. E. p. 711. — Fl. Calif. I, 272. 
On all islands at elevations of 2000—6000 ft., most common on Haleakala, but occasionally 
descending much lower down, as to Diamond Hill near Honolulu. The plant belongs to 
the W. Coast of N. America, from Nootka Sound to Mexico, extending thence to the 
Southern States, and has also been found in Patagonia; but it undoubtedly was at the 
Islands before tie Discovery, for it chiefly grows in wild uninhabited mountain regions. 
5. CAUCALIS, L. 
Calyx 5-toothed. Petals nisinny, inflected, the exterior ones radiating, 
ifid. Disk conical. Fruit ovate, somewhat compressed a terally, con- 
stricted at the commissure. "Guxbils almost terete, the 5 primary ribs 
filiform, shortly setose, the 2 2 lateral ones facing the commissure; the 
4 secondary ribs prominent ard beset with barbed prickles. Oil-tubes 
ni uc WwW i r 
consisting of 1 or 2 bracts. Involucel of 3—8 aaa ie cacti 
Flowers white. 
A small Mediterranean genus. 
71. C. daucoides, L. — Stem 6—12' high, glabrous. Ultimate segments 
of leaves linear, acute. Umbels opposite the leaves, on a peduncle of 
3”, with 4—6 rays of 4“ and as many raylets of 2” in length. Bracts 
of involucel linear, serrate, nearly as long as the raylets, Fruit ovoid, ee 
with short erect styles. Barbed prickles in one row, subulate, as long as 
the fruit is broad. 
Kauai! in cultivated fields of Waimea (Bn.), .A European weed of recent introduction. 
Orper XL. ARALIACEAE. 
Calyx adnate to the ovary, either entirely so or showing a minut 
border round the summit, with as many teeth as petals. Petals saan 
