614 UMBELLIKERAE 



Leaflets not iiu-iscd, iiieri'ly acrnite or toothed or entire; oil-tuhes 1 to 3 in the 



intervala 29. Anokuca. 



Hilis very tliick and corky; fruit slightly flattened laterally if at all; petioles in- 

 flated 30. COELOPLEtJRUM. 



Umbellets capitate; fruit cuneate-obovate, flattened dorsally, pubescent 



31. Sphenosciadium. 

 Mostly low plants, the leaves and peduncles all basal; oil-tubes several in the intervals; 



flcnvi IS wliite, yellow or jnirple; fruit flattened dorsally or not at all 



32. Cymopterus. 



B. Fruit bearing prickles, bristles or scales. 



Ribs none; oil-tubes none except in no. 34. 



Fruit covered with hyaline scales; flowers greenish-white or blue, in dense heads; prickly 



perennial herbs 33. Eryngum. 



Fruit bur-like, covered with hooked prickles. 



Flowers yellow or purple, mostly in head-like clusters; perennials 34. Sanicula. 



Flowers white, in compound umbels; annuals 35. Anthriscus, 



Ribs present ; flowers white. 

 Oil-tubes none or obscure. 



Fruit with an elongated beak several times longer than the muriculate body ; annuals.... 



36. Scandix. 

 Fruit not beaked or with a short beak several times shorter than the smooth body ; ribs 



bristly; perennials 37. Os.morrhiza. 



Oil-tubes present, usually conspicuous. 



Fruit somewhat flattened dorsally; prickles barbed; calyx-tocth obsolete; umbel com- 

 pound 38. Daucus. 



Fruit flattened laterally ; bristles hooked ; calyx-teeth obvious. 



Umbels subcapitate, opposite the leaves; fruit prickly on one carpel, warty on the 



other 39. ToRiLis. 



Umbels compound, terminal and lateral ; fruit prickly on both carpel3..40. Caucalis. 



1. HYDROCOTYLE L. 



Perennial glabrous herbs, the peduncles and leaves from creeping stems or 

 rootstocks. Leaves simple, the blades round in outline, long-petioled. Flowers 

 in a small simple umbel, or disposed in 2 or more umbels which are proliferous one 

 above the other. Involucral bracts present in ours, small (V2 line long). Fruit 

 flattened lateralh^ suborbicular, the dorsal rib prominently margined and with 

 one or 2 filiform ribs on each side. Oil-tubes none. — Species 78, all continents. 

 (Greek hudor, water, and cotule, a low vessel, the peltate leaves of some species 

 being saucer-shaped.) 



Leaves not peltate, 5 or 6-cleft; umbels simple 1. S. ranunculoides. 



Leaves peltate, more or less crenate. 



Umbels simple; fruit notched at base and apex 2. H. umbellata. 



Umbels proliferous, forming an interrupted spike. 



Fruit not notched at base, sessile or on very short pedicels 3. H. verticillata. 



Fruit notched at base, the pedicels 1^ to 7 lines long 4. R. proUfera. 



1. H. ranunculoides L. f. Water Pennywort. Stems floating or creeping 

 in mud, rooting at the nodes; leaf-blades orbicular, (% or) 1 to 1% inches broad, 

 5 or 6-cleft, the lobes crenulate; petioles 3 to 5 (or 9) inches long; peduncles I/2 

 to 21/2 inches long, reflexed in fruit; pedicels % line long; fruit ovoid, 1 line broad; 

 ribs obscure. 



Pools or muddy shores, often floating in deep water, 5 to 4600 feet : South 

 Coast Ranges to Southern California. East to the Atlantic. May, fr. July. 



Locs. — Butano Creek, San Mateo Co., Jepson 4161; Milpitas, B. J. Smith; San Jose, Jepson 

 14,237; Moss Ldg., Monterey Co., Abrams 4056; Victorville, Jepson 5608; Thomas Valley, San 

 Jacinto Mts., Hall 2168; Bubbling Spr., Collins Valley, Jepson 8836; Warner Ranch, San Diego 

 Co., T. Brandegee ; Laguna Mts., T. Brandegee. 



Refs. — Hydrocotyle ranunculoides L. f. Suppl. 177 (1781), type loc. Mexico; Jepson, 

 Fl. W. Mid. Cal. 342 (1901), ed. 2, 288 (1911), Man. 705, fig. 685 (1925). 



