124 
Papilionacefe. 
160. Lathyrus. Pea. XVII ; 20 ; 3. 
1. Petiole terminated by a simple or branched tendril. 
Stem gen. climbing ...... 2 
— Petiole terminated by a simple point (which is occasion¬ 
ally wanting) or by a leaf. Stem gen. erect. Or obi spec. auct. 12 
2. Racemes 1—2-fid. Ls with 1 (rarely 2) pair. Ann. or 
bienn. pis ........ 3 
— Racemes several* (4—12) fid. Ls with 1 or several pairs. 
Perenn. pis ........ 7 
3. FIs yellow. Stipules oval, cordate-sagittate at the base, 
representing the leaflets which are wanting; sometimes 
(but rarely) the petiole is terminated by 1 or 2 narrow 
leaflets instead of the tendril (w.foliolosa Brebiss.\ Schaffh.!) 
— Cornfields, here and there (wanting in W. U. A.). 6 
Aphaca L. 598. 
— FIs never yellow .. 1 
4. Common peduncles much longer than the ls. Pods rough. 
Seed rough-granular. FIs violet blue.—Fields; not every¬ 
where (wanting in G. A.). 6 . . hirsutus L. 599. 
— Common peduncles shorter than the ls. Pods glabr. 
Seeds smooth ........ 3 
5. Pods linear, narrow (5—6 mm broad). Tendrils all simple. 
Style not twisted. FIs small, rose-coloured.—Fields, grassy 
places; Wall., Geneva (Branson, Raters; Vernier, Com- 
pesieres). 5.sphsericus Retz. 600. 
— Pods oblong, broader. Tendrils gen. branched. Style 
twisted on its axis ...... O 
6- Pod channelled on the upper edge. Stipules as long as 
the petiole. FIs rather small, rose-coloured.—Fields, rare; 
V. B. J. 5.Cicera L. 601. 
— Pod with 2 wings on the upper edge, broader than in 
the last. Stipules shorter than the petiole. FIs fairly large, 
white, rose, or blue.—Cultivated and rarely subspon- 
taneous. 5 . . . . f sativus L. 602. 
7 (2). FIs yellow. Ls with 1 pair of leaflets. L. Lusseri 
Heer (subalpine form, almost glabr., with large fls).— 
Plains; everywhere. 6 . pratensis L. 603. 
— Fls red or blue ....... 8 
8. Stem angular. Fls bright purple. Rt-stock slender, with 
tubercles the size' of a nut on its lower portions — 
Stubble; (only wanting in L. U.) 6 tuberosus L. 604 
— Stem winged . . . . . . . .9 
9. Petioles not winged. Fls purplish. Ls with 2—3 pairs. 
—Marshy places, not common (wanting in G. T. S.). 6 
palustris L. 605. 
— Petioles winged. Fls rose-coloured . . . 10 
