AMMIACEAE. 



Vol. it. 



2. Ligusticum scoticum L. Scotch 



or Sea Lovage. Sea Parsley. 



Fig. 3152- 



Ligusticum scoticum L. Sp. PI. 250. 1753. 



Stem simple, or rarely slightly branched, 

 io'-3° high. Leaves mostly biternate, the 

 segments thick and fleshy, broadly obovate- 

 ovate or oval, I '-4' long, shining, obtuse or 

 acute at the apex, narrowed or the terminal 

 one rounded at the base, dentate with blunt 

 or sharp teeth ; umbels 2'-^' broad in fruit, 

 the rays I'-z' long; pedicels 2"--," long; 

 fruit oblong, z"-S" long, the ribs prominent 

 and somewhat winged; seeds rounded on 

 the back. 



Along salt marshes. New York to Labrador 

 and the lower St. Lawrence river. Also on 

 the Pacific coast and the shores of northern 

 Europe and Asia. The plant of the New Eng- 

 land coast has more acute leaf-segments tbaa 

 the typical form. Shunis. July-Aug. 



36. LILAEOPSIS Greene, Pittonia 2: 192. 1891. 



[Ceantzia Nutt. Gen. i: 177. 1818. Not Scop. 1777.] 

 Small creeping glabrous perennial marsh herbs, the leaves reduced to linear terete sep- 

 tate hollow petioles, with simple umbels of white flowers. Bracts of the involucre several, 

 small. Calyx-teeth acute. Petals concave, acute, incurved at the apex. Stylopodium conic. 

 Fruit glabrous, globose, somewhat flattened laterallly. Carpels nearly terete, the dorsal and 

 intermediate ribs filiform, the lateral ones much larger and corky-thickened, the commissural 

 faces each with a corky longitudinal projection; oil-tubes solitary in the intervals, 2 on the 

 commissural side. Seed terete. [Greek, resembUng the genus Lilaea.] 

 A genus of wide geographic distribution, usually regarded as monotypic. 



I. Lilaeopsis lineata (Michx.) Greene. Lilae- 

 opsis. Fig. 3153. 



Hydrocotyle chincnsis L. Sp. PI. 339. 1753? 

 Hydrocotyle lineata Michx. Fl. Bor. Am. i : 162. 1803. 

 Crantsia lineata Nutt. Gen. i : 178. 1818. 

 Lilaeopsis lineata Greene, Pittonia 2: 192. 1891. 



Creeping, rooting in the mud, 2'-$' long. Petioles 

 linear-spatulate, very obtuse, generally i'-3' long but 

 sometimes much longer, about i\" thick, hollow, dis- 

 tinctly jointed by transverse partitions ; peduncles some- 

 what exceeding the leaves ; umbels S-io-rayed, the rays 

 ii"-3" long; fruit about i" long. 



In salt and brackish marshes, and on muddy river-shores. 

 New Hampshire to eastern New York and Florida, west to 

 Mississippi. June-Aug. 



37. HYDROCOTYLE L. Sp. PI. 234. 1753. 



Perennial herbs, prostrate and commonly rooting at the joints, with palmately lobed or 

 veined, often peltate leaves, the bases of the petioles with 2 scale-like stipules, and small 

 white flowers in peduncled or sessile simple or proliferous umbels or heads. Bracts of the 

 involucre few and small, or none. Calyx-teeth minute. Petals entire. Disk flat. Fruit 

 laterally compressed, orbicular or broader than high. Carpels with 5 primary ribs, the 

 lateral ones usually curved; no large oil-tubes, but an oil-bearing layer of tissue beneath 

 the epidermis. [Greek, water-cup.] 



About 75 species of wide distribution. Besides the following another occurs in the Southwest 

 and on the Pacific Coast. Type species ; Hydrocotyle vulgaris L. The species are known as Marsh-, 

 or Water-pennywort, or Water-cup, 

 Leaves nearly orbicular, peltate. 



Umbels simple, rarely slightly proliferous; pedicels slender. i. H.nmhellata. 



Umbels, at least some of them, proliferous ; pedicels, or some of them, short. 

 Fruit notched at each end. 2. 



Fruit not notched at either end. 3. 



H. Canhyi. 

 H. verticillata. 



