330 ORDER LXI. — UMBELLIFER.B. 



4. H. refan'da, (Pers.) Stem creeping. Leaves cordate, rounded, re- 

 pandly toothed, hairy when young. Flowers in capitate umbels, 3 — 4- 

 flowered. Fruit reniform, 4-ribbed on each side ; involucre 2 concave 

 bracts. — White. 2£. Through the summer. Damp soils. 



5. H. rantjnculoi'des, (L.) Stem creeping or floating, glabrous 

 Leaves reniform, 3 — 5-lobed, crenate. Umbels 5 — 10-flowered, on pe- 

 duncles shorter than the petioles. Fruit orbicular, smooth, obscurely 

 2-ribbed on each side. — White. U . July — Aug. Around ponds. 



Genus II.— CRANT'ZIA. Nutt. 5—2. 

 (In honor of Crantz, an Austrian.) 



Calyx with a subglobose tube ; margin obsolete. Petals 

 roundish, entire, obtuse. Fruit subglobose, nearly orbicular. 

 Carpels unequal, small, glabrous. Umbels few-flowered, sim- 

 ple. Creeping plant, with linear, entire, succulent leaves. 



1. C. linea'ta, (Nutt.) (Hydrocotyle lineata of Elliott.) Leaves erect, 

 1 — 2 inches long, marked with transverse lines, cuneate, linear, obtuse. 

 Umbels 8— 12-flowered. Involucre 5 — 6-leaved. — White. U- April 

 —May. Low country. 



Tribe II— SANICULE'^E. 



Seed flat on the face. Umbels simple. Vittce usually none. 

 Fruit ovate, globose. 



Genus III.— SANIC'ULA. Tourn. 5—2. 

 (From sano, to heal.) 



Calyx with 5 somewhat foliaceous teeth. Petals obovate, 

 erect, with a long inflexed point. Carpels clothed with hooked 

 bristles, without ribs. Seeds hemispherical. Radical leaves on 

 long petioles. 



1. S. Marilan'dica, (L.) Stem terete, glabrous, dichotomously branch- 

 ed toward the summit. Leaves digitately 5-parted ; segments incisely 

 serrate, the middle lobe distinct to the base, lateral ones slightly conflu- 

 ent at the base. Flowers in somewhat capitate umbels, a part sterile ; 

 fertile ones nearly sessile ; tube of the calyx echinate. Fruit oval. 

 Seed flat on one side. — White. If. May — Aug. Damp soils. Com- 

 mon. 



Genus IV.— ERYN'GIUM. Tourn. 5—2. 

 (Fom the Greek ereugo, to belch ; supposed to be a cure for flatulency.) 



Flowers capitate. Calyx with a roughened tube, with some- 

 what foliaceous lobes. Petals oblong, ovate, emarginate, with 

 a long inflexed point. Fruit obovate, crowned. Carpels semi- 

 terete. Flowers bracteate, the lower large, the others inter- 

 mixed with the flowers, small, scale-like. 



1. E. aquat'icum, (L.) Stem glabrous, fistular, small. Leaves broadly 

 linear, remotely ciliate, with soft spines ; floral leaves undivided, equal, 



