460 ACOTYLEDONOUS PLANTS. 



plant, keeping close to the ground in muddy soils. Peduncle 

 erect, 3 4 inches high, slender, with a single spike. 



2. L. clavatum Linn. : stem creeping, with ascending branches : 

 leaves scattered, incurved, ending in hairs ; spikes in pairs, rarely in 

 threes, cylindrical, pedunculate ; scales ovate, acuminate, erosely 

 denticulate. L. tristachium Nutt. not of Pursh. L. integrif <*!"' ' 

 Goldie. 



HAB. Pine woods. Can. and N. S. W. to Michigan. July. 

 11. Stem closely trailing on the ground, very long, rooting 

 and throwing up fertile branches 46 inches high. Leares li- 

 near-lanceolate, entire or serrulate. Spikes yellowish, erect. 



3. L. complanatum Linn. : stem trailing, with dichotomous branch- 

 es ; leaves 2-rowed, connate, spreading at the tips ; superficial ones 

 solitary, appressed ; peduncles elongated, supporting 4 terete cylin- 

 drical spikes. 



HAB. Woods. Can. to Car. N. to Arc. Amer. July. If. 

 Stem 2 10 feet long, dichotomously branched. Leaves 4- row- 

 ed, short ; two larger 2-rowed ; smaller ones close pressed to 

 the flattened sides of the stem. Spikes 2 4, on elongated pe- 

 duncles. 



4. L. sabin<$folium WiUd. : stem erect ; branches alternate, dichot- 

 omous ; leaves lanceolate, acute, in 4 rows, appressed, convex ; spikes 

 terete ; scales subcordate, acuminate. L. uljiinum J//Y//. 



HAB. White Mountans, N. H. N. to Labrador. W. to Michi- 

 gan. July. It. This species, of which I have specimens from 

 the White Mountains, which agree in all respects with those in 

 the Herbarium of Mr. Schweinitz, differs strikingly in appear- 

 ance from L. alpinum. The stem is erect, the leaves are large 

 and somewhat spreading, lanceolate, acute or acuminate, some- 

 times denticulate. The whole plant also is larger, and the 

 branches much longer. 



<%, 



** Spikes sessile. 

 t Leaves in all directions. 



5. L. dendroidtum Mich. : stem erect ; branches alternate, crowded, 

 dichotomous, erect ; leaves linear-lanceolate, in 6 equal rows, spread- 

 ing; spikes numerous, terminal, sessile 



b. obscurum Torr. : branches spreading ; spike mostly solitary, 

 sessile. L. obscurum Linn. Big. 



HAB. Shady woods. Can. to Car. July. U.Stcm 68 in- 

 ches high, with numerous erect branches. Spikes 1 4 on each 

 plant, an inch long, with broad ovate scales. 



6. L. annotinum Linn. : stem creeping ; branches ascending, di- 

 chotomous ; branches simple ; leaves in 5-rows, linear-lanceolate, 

 mucronate, serrulate, spreading ; spike oblong, solitary, sessile, ter- 

 minal. 



HAB. Mountain woods. N. S. N. to Arc. Amer. July. It- 

 Stem creeping, sending up 4 8 ascending branches, which 

 are 6 8 inches high. Leaves spreading and somewhat reflexed 



