90 DICOTYLEDONOUS PLANTS. 



P. maritinium Linn. : stem square, compressed ; petioles flat above; 



leafets 58, ovate or rounded, often alternate, somewhat pubescent ; 



stipules ovate-semisagittate ; peduncles many-flowered, shorter than 



the leaves ; legumes oblong, obliquely reticulate, small ; seeds small, 



numerous, roundish. fMthijrus maritimus Big. ? 



HAB. Shores of the great lakes. Nutt. Salt marshes, Boston. 

 Big. ? May, July. 2_. Plant pale green. Flowers blue and 

 purple, large, 6 S in a raceme. I insert this plant upon the au- 

 thority of Pursh, Nuttall and other authors, but have no means 

 of determining whether it is truly a Pisvm. Dr. Bigelow's plant, 

 of which I have specimens from Dr. C. Pickering, seems to me 

 to be a Latliyrus ; but until the question of the identity of these 

 plants is more satisfactorily determined, I have thought proper 

 to leave them as above. Beach Pea. 



21. LATHYRUS. Linn. 



Calyx campnnulate, 5-cleft ; two upper lobes shorter. Ca- 

 rol papilionaceous. Stamens diadelphous. Style flat, dilat- 

 ed at the summit, villous or pubescent on the upper side. L- 

 gtune oblong, many seeded, 2-valved, 1-celled. Seeds globose 

 or angled. Diadelphia. Decandria. 



1. L. venosns Muhl. : stem square, naked ; leaves pinnate ; leafets 

 numerous, (about 5 pairs) ovate, obtuse, subopposite, mucronate, 

 smooth, veined ; stipules semisagittate, ovate ; peduncles many-flow- 

 ered, shorter than the leaves. 



HAB. Low meadows. N. Y. Penn. July, Aug. If. lAttfds 

 large. Flowers purple. \y-uaoed VetcJwng. 



2. L. paluslris Linn. : stem smooth, winged, weak ; leafets in 3-pairs, 

 oblong, mucronate ; stipules semisagittate, acute ; peducles 3 5- 

 flowered, a little longer than the leaves ; segments of the calyx un- 

 equal, sublinear, as long as the tube ; legume compressed. 



HAB. Low grounds. Can. and N. S. June, July. 2. Stem 

 lax. Leafets varying in width. Flowers pale purple. 



3. L. myrtifohus Muhl. : stem weak, flexuous, square ; leafets 4, ob- 

 long-lanceolate, somewhat obtuse, mucronate, rigid, smooth, veined ; 

 stipules semisagittate, lanceolate, acuminate, scabrous on the margin ; 

 peduncles 3 4-flowered, longer than the leaves. 



HAB. Salt marshes. N. Y. and Penn. July, Aug. It. Re- 

 sembles the former. Flowers smaller, purple and rose-coloured. 



4. L. glaucifolius Beck : stem nearly erect, acute-angled ; leafets in 

 3-pairs, ovate, obtuse, mucronate, glaucous and reticulate beneath ; 

 stipules largo, semisagittate, broad-ovate, acuminate ; peduncles 4 10- 

 flowered, shorter than the leaves ; legume compressed, glabrous. 



HAB. Rocky banks of the Raritan river near New-Brunswick, 

 N. J. May, June. 21 This plant appears to me to be decid- 

 edly distinct. The leafets are uniformly broader and larger than 



