144 
37. TJMBELLIFER.B. 
terminal or lateral, frequently almost sessile, accompanied by 1 
or 2 temate leaves. Fl. small, white. — j\Iarshes and ditches, 
especially near the sea. P. VI. — VIII. E. S. I. 
7. Peteoseli'num Hoffm. 
Jl. P. satimm (Hoffiii.) ; I. tripinnate shining, leaflets of the 
lower 1. ovate-cuueate trifid and toothed, of the upper 1. temate 
lanceolate entire. — E. B. S. 2793. — Partial inv. filiform. L. green- 
ish.— Rocks and old walls. B. VI.— Vin. Parsley. E. S. I. 
2. P. seg 'etuin (Koch) ; lower /. pinnate, leaflets nearly sessile 
ovate lohed and sen-ate, upper 1. entire or trifid. — Sism Sm., 
E. B. 228.— Umbels very iiTegular. General inv. of 1 — 2 leaves. 
Fl. whitish. St. erect, roundish, nearly leafless above, 1 — 1^ foot 
high, wiry. — Damp calcareous fields and near the sea. B. VIII. 
IX. E. 
8. Tbi'nia Hoffm. Honewoct. 
1. T. vulgaris (DC.) ; glabrous, inv. 0 or of 1 leaf, ridges of the 
fr. blunt. — Pimphiella dioica Sm., E. B. 1209. — L. tripinnate, 
glaucous green ; Its. linear or filifonn. Root crowned with the 
remnants of former leaves. St. branched, erect, 6 — 8 in. high. 
Dioecious. — Dry limestone Jiills, rare. P. V. VI. E. 
9. Heloscia'dium Koch. 
1. H. 7iodifl6rum (Koch) ; st. procumbent at the base and 
rooting, 1. pinnate, leaflets ovate or ovate-lanceolate unequally 
bluntly serrate, imibels opposite to the 1. longer than their pe- 
duncles or nearly sessile.- — Sium Sm., E.B. (339. — St. 1 — 2 feet 
long. — a ; general inv. soon falling of 1 — 3 Its., anth. purple. — 
/3. H. repem (Koch) ; st. procumbent, Its. roundish-ovate un- 
equally and acutely incise-seiTate, imibels shorter than the 
pedmicles, general inv. persistent of several Its., anthers yellow. 
E. B. 1431.— Banks of ditches and broojis. ; P. VII. VIII. 
2. H. hmnddtinn (Koch) ; st. creeping, 1. pinnate, Its. of lower 
I. in capillary segments, of upper 1. wedgeshaped and trifid, um- 
bels generally with 2 rays. — Sium Sm., E. B. 227. — Usually sub- 
mersed, a few of the upper 1. and the fl. rising above the water. 
Partial umbels very small.— Ponds. P. \l. \'II. E. S. I. 
10. Si'soN Linn. Stonewort. 
1. S. Amdmum (h.).—E. B. 954.— St.' erect, panicled, 2—3 
feet high. Lower 1. pinnate ; Its. oblong lobod cut and serrate, 
upper 1. divided into narrow segments. I'artial umbels and fl. 
small. — Dampish places on a calcareous soil. B. VIII. E. S. 
