314 UMBELLIFER^. 



Fruit much compressed dorsally and winged ; 



Lateral wings broad, distinct, the dorsal ones often less 



prominent, - ------- 19 — 21 



Lateral wings thin, coherent until maturity ; dorsal 



ribs filiform, 22-24 



1. HYDROCOTYLE, TournefoH (Marsh Pennywort). Low glabrous 

 herbs, growing in or near water, with creeping stems. Leaves rounded, 

 toothed or lobed, sometimes peltate; stipules scale-like. Flowers incon- 

 spicuous, in simple umbels, or in whorls one above another, on a scapi- 

 form erect peduncle. Calyx-teeth obsolete. Petals entire, acute. Fruit 

 flattened laterally, suborbicular, acutely margined, and with 2 or more 

 less prominent ribs or nerves on each side; oil-tubes 0; carpels coherent. 



1. H. prolifera, Kellogg, Proc. Calif. Acad. i. 15 (1854). Herbage 

 light green and flaccid: leaves about 1 in. broad, peltate, emarginate at 

 base, simply crenate, on petioles 1 — 4 in. long: peduncles equalling or 

 exceeding the leaves: fl. in 1—4 whorls, each 4— 12-fiowered, with many 

 bractlets; pedicels 1—6 lines long: fr. 1 line wide, emarginate at base; 

 ribs 2 on each side, prominent.— Said to occur near San Francisco, a 

 locality which we have not been able to confirm ; but it is common in 

 the interior, near Sacramento, Drew; also in the Suisun marshes, where 

 it exhibits dichotomously branched peduncles. June— Aug. 



2. H. raiiuiiculoides, Linn. f. Suppl. 177 (1781). Herbage dark green, 

 of firm texture : leaves (sometimes floating) 1—2 in. broad, round-reni- 

 form, 3— 7-cleft, the lobes crenate; petioles 2 — 10 in. long; peduncles 

 much shorter {% — 3 in.), reflexed in fruit: fl. 5—10 in a capitate umbel: 

 fr. very shortly pedicellate, 1 — 1)4, lines broad, with thickened but scarcely 

 angled margins, rather obscurely nerved on each side, longer than the 

 pedicels. — Abundant in shallow ponds, margins of lakes, etc., along the 

 seaboard. 



2. BOWLESIA, Ruiz & Pavon. Slender very flaccid herbs, with 

 sparse stellate pubescence, and opposite simple leaves with scarioits 

 lacerate stipules. Flowers minute, white, in simple few-flowered umbels 

 on axillary peduncles. Calyx-teeth rather prominent. Petals elliptical, 

 obtusish. Fruit broadly ovate, with narrow commissure, turgid, becoming 

 depressed on the back, without ribs or oil-tubes. 



1. B. lobata, R. & P. Fl. Peruv. iii. 28 (1802). Annual, the slender 

 stems more or less dichotomous, 2 in. to 1 ft. long: leaves round-reniform 

 or cordate, fj — l^^ in. broad, shorter than the slender petioles, deeply 

 5-Iobed; lobes acutish, entire or few-toothed: umbels short-peduncled, 

 1 — 4-flowered: fr. 1 line long, sessile or nearly so, pubescent, the inflated 

 calyx not adherent to the carpels. — Among rocks, under trees etc., on 

 hillsides from the valley of the Sacramento southward; frequent in the 

 Coast hills south of San Francisco, and in Napa Valley. Apr., May. 



