178 UMBELLIFER.E. (PARSLEY FAMILY.) 



marsh herbs, with hollow stems, and twice pinuately or ternately divided 

 leaves. Involucels many-leaved. Flowers white. 



1. C. maculata, L. Stem large (.3-6 high), purplish; leaflets ovate- 

 lanceolate, acute, coarsely serrate ; umbels large, many -rayed. Marshes and 

 river banks. July. Plant very poisonous. 



8. APIUM, L. 



Calyx teeth 5, or obsolete. Fruit ovate or oblong, flattened on the sides, 

 the carpels equally 5-ribbed. Intervals with single vittaj. Flowers white. 



1. H. nodiflorum, Koch. Stems prostrate or creeping; leaves pinnate; 

 leaflets ovate-lanceolate, serrate ; umbels short-peduncled, opposite the leaves ; 

 involucre 1-2-leaved or none; involucel 5-6-leaved. Ditches, etc. around 

 Charleston. Introduced. April -June. Stems 2 long. 



2. H. leptophyllum, DC. Stem erect or diffuse ; leaves ternately or 

 biternately divided, the divisions linear or setaceous ; umbels nearly sessile, 

 1-3-rayed; involucre and involucel none; fruit ovate. East Florida, and 

 westward. Introduced. Stem | - 2 high. Fruit very small. 



9. LEPTOCAULIS, Nutt. 



Calyx teeth obsolete. Fruit ovate, compressed on the sides, often rough or 

 bristly. Carpels 5-ribbed, the intervals with single vittas, and 2 on the face. 

 Slender smooth herbs, with finely dissected leaves, and white flowers. 

 Umbels few-rayed. Involucre none. Involucel few-leaved. 



1. L. divaricatUS, DC. Annual ; stem (6'- 18' high) widely branched ; 

 leaves 2 3-pinnatifid, with the divisions filiform ; umbel 3 4-rayed. (Sison 

 pusillum, Michx.) Dry sandy soil, Florida to North Carolina. April. 

 Fruit very small, roughened with minute scales. 



2. L. echinatus, Nutt. Leaves, etc. as in the preceding, bnt the fruit 

 beset with rigid spreading hooked bristles. Mobile (H/ohr), and westward. 



10. DISCOPLEURA, DC. 



Calyx teeth subulate, persistent. Fruit ovate ; the carpels strongly 3-ribbed 

 on the back, and with two lateral ribs united with a thick corky margin. 

 Intervals with single vittse. Smooth annuals, growing in marshes. Leaves 

 piunately dissected, with the filiform divisions often whorled. Involucre and 

 involucel conspicuous. Flowers white. 



1. D. capillacea, DC. Umbels 3-10-rayed; leaves of the involucre 

 mostly 3-5-cleft; fruit ovate. (Ammi capillaceum, Alichr.) Brackish 

 marshes, Florida to Mississippi, and northward. June -July. Stem l-2 

 high, much branched. Earliest leaves simple, or simply pinnate. 



2. D. Nuttallii, DC. Umbels many-rayed ; leaves of the involucre 5-6, 

 entire ; fruit globose. Low ground, Florida, Georgia, and westward. Stem 

 2 - 6 high. 



