888 



LATHYRUS 



LATH YR US 



Lathynis. characterized in part by the lack of tendrils. 

 (See, also, Orobus.) Lathyrus has Ivs. equally pinnate, 

 ending in a tendril or in a point; Ifts. 2 or several; stip- 

 ules leafy, Iaris:e and prominent, half -sagittate: fis. soli- 

 tary or racemose, on long axillary peduncles; calyx ob- 

 lique-campanulate, 5-parted, the upper teeth often 

 shorter; corolla dark blue, violet, rose, white or yellow, 

 or a union of these, the standard large, broadly obovate 

 <ir roundish, notched, with a short claw, the wings fal- 

 cate-obovate or oblong, the keel shorter than the wings, 

 incurved, obtuse ; stamens dia- 

 delphous {9 and 1) or monodel- 

 phous below: ovary a one-celled 

 pod, s e V e r a 1 - o V u 1 e d ; style 

 CTirved, usually twisted, flattened, 

 hairy along the inner side ; pod 

 fliit or terete, 2-vu.lveil, dehis- 

 cent. 



1242. Lathyrus Tineitanus. 



Sometimes sold as a form 

 of sweet pea. 



albiflorMS. 7. 

 albus, 7, Its. 

 grandiflovus, 3, 7. 

 latifolius. 7. 

 Intevs, 13. 

 Magellaniciis, 8, 

 maritimus, 10. 

 montfinns;, 13. 

 rni/rtifcHns, It, 

 niger, 1.5. 

 odoratus, 1, 



Orohvs, in. 1:', 16. 

 pahistris, 0. 

 polymorphus, 14. 

 rotundifolins, 5. 

 Sibthorpi, 6. 

 spleudeus, 7, 12. 

 sylvestris, 4. 

 TingitaDus, li. 

 undnlatns 

 \eTiosiis, 11. 

 veruiis, It). 



A. Habit climbing : Ivs. tendril-hearing. (LufJiyrn.s.) 

 B. Annuals: leaflets one pair. 



1. odor&tuB. Linn. Sweet Pea. Stem rough-hairy, 

 winged : Ifts, oval or oblong, niucronulate ; stipules 

 lanceolate peduncle 2-4-tld., much longer than the Ivs. : 

 lis. in shades of blue, red, yellow and white, fragrant, 

 the shield large and showy, expanded, sometimes 

 "hooded:" pod 1-2 in. Summer. Sicily. B.M.IJO. — For 

 culture and varieties, see Sweet Pea. 



2. Tingitfi.nu8, Linn. TANniKR Scarlet Pea. Fig. 

 1242. Sts. spreading, winged, glabrous, .'( ft. long: Ifts. 

 linear-lanceolate, obtuse, niucronulate; stipules lanceo- 

 late: peduncle 2-fld., longerthan the Ivs.: fls. 1 in. long, 



dark red-purple; shield large, purple, wings and keel 

 bright red: pod 4— 5 in. long. June, July. W. Medi- 

 terranean region. B.M. 100. — An earlier annual than 

 the Sweet Pea, and because of its vigor should be kfpt 

 away from it or it will run it out. 



BE. Perennials. 



c. Lvs. with 1 pair of leaflets. 



D. Stipules narrow. 



3. grandifldras, Sibth. and Sm. Everlasting Pea. 

 Two-flowered Pea. Stem winged, 4-0 ft. long: Ifts. 

 large, ovate, obtuse, niucronulate, undulate ; tendrils 

 branched, short ; stipules small : peduncles 2-3-fld., 

 longerthan the lvs.; shield large, obcordate, notched, 

 broad, rose-purple, wings dark purple: pod linear, 3 in. 

 June, July. S. Eu. B.M. 1938.— Larger vine thani. lati- 

 folius, but weaker and less rampant. Fls. as large as 

 those of the Sweet Pea. Free-flowering, siicceeding in 

 any soil, not requiring much light. Adapted to banks, 

 along walk-margins in woods, among strong shrubs, aiHl 

 as a covering for rocks. 



4. Bylv6stris, Linn. Flat Pea. Stem straggling nr 

 climbing, 3-5 ft. long, stout, winged, glabrous, with creep- 

 ing rootstock: Ifts. linear-lanceolate, thick, with winged 

 leafstalk: peduncle 3-0-fld., equaling the lvs. : fls. /^in. 

 long; standard rose, with green spot on its Vjack; wings 

 purple at summit; keel greenish: pod lanceolate, 2-3 in. 

 long. All summer. All Europe, in thickets and rocky 

 places. — Inferior ornamentally to other perennials, but 

 valuable as a forage plant for cattle and for plowing 

 under in a green state as a fertilizer. Grows well on 

 poor, unimproved sandy soil, and is unaffected by frosts 

 and droughts. For garden culture, it may be sown in a 

 seed-bed and transplanted when of suitable size. Its 



seeds in the wild state are said to 

 be to some degree unhealthfui. 

 but in the cultivated form this 

 quality has been bred out. 



.5. rotundifdlius.Willd. Persian 

 Everlasting Pea. Low-grow- 

 ing, winged species : Ifts. ovate; 

 stipules toothed: peduncles 

 many-fld., longer than the lvs.; 

 fls. large, rose-pink. June. Rus- 

 sia and the East. B.M. 6522. -A 

 species of easy culture, requiring 

 a cool, shady and sheltered posi- 

 tion. Adapted to stony banks. 



6. imdul&.tus, Boiss. {L. Sibthorpi, Baker). Stems 

 twining, broadly winged: Ifts. oblong; peduncle .5-6-fld. : 

 fls. a mauve-red. S.B.F.G. 333.- A form intermediate 

 between 1/. latifolius and L. rotundifolins. A somewhat 

 tender species, said to be G weeks earlier than any other. 



DD. Stipules broad. 



7. latifdllus, Linn. Everlasting Pea. Perennial 

 Pea. Fig. 1243. Stem winged, 4-8 ft. : Ifts. ovate-elliptic 

 or ovate-lanceolate, somewhat glaucous, raucronate, 2-3 

 in. long; tendril branching: peduncle many-fld., longer 

 than the lvs.: fls. rose, large : pod flat, 4-5 in. long. 

 Aug. Woods of Europe. — This is the common Perennial 

 Pea, and one of the hardiest and most easily cultivated 

 species, thriving almost anywhere, even among flags and 

 boulders. A rampant grower, it is a good trellis plant, 

 and is adapted as a cover to wild, rough places, where 

 it scrambles over Imshes and stones. It succeeds in 

 shade and grows rapidly, but. like all species of Lathy- 

 rus, it is impatient of removal, owing to the size and 

 length of its roo1s. Has no place in the border. Its 

 varieties are not clearly defined. Var. 6,lbus, Hort., the 

 white form, is adapted to the same uses as the type, and 

 is, besides, valuable to florists wanting white flowers in 

 midsummer. Var. spUndens, Hort., dark purple and 

 red, is said to be the l)est form of the type, but does not 

 come true from seed. There is a striped form. also. 

 Other trade names are vars. albiildrus and granditlorus. 



8. Magelldnicus, Lam. Lord Anson's Blue. Stem 

 3-5 ft. long, smooth, angled, somewhat branched: Ifts. 

 ovate or oblong-linear; tendrils branched; stipules cor- 

 rlate-sagittate, broad: peduncles long, 3— 4-fld.: fls. dark 

 purple-ldue. June, July. Straits of Magellan. S.B.F.(t. 

 II. 344. — A strong-growing, woody, almost evergreen 



