338 



LEGUMINOS^l. CLXXIV. OROBUS. 



for fattening oxen). Tourn. inst. t. 214. Lin. gen. no. 871. 

 D. C. fl. fr. 4. p. 586. D. C. prod. 2. p. 37G. 



LIN. SYST. Diadelpltia, Dccdndria, Calyx campanulate, 5- 

 cleft, the 2 superior lobes shortest. Corolla papilionaceous. 

 Stamens diadelphous. Style slender, linear, villous at the apex. 

 Legume cylindrical, oblong, 1-celled, 2-valved, many-seeded. 

 Seeds with a linear hylum. Erect herbs, with semi- sagittate 

 stipulas. Petioles ending in a short simple bristle. Leaves 

 abruptly pinnate, with few pairs of leaflets. Racemes of flowers 

 axillary, pedunculate. 



1 . Leaves with only one pair of leaflets, which are either 

 ovate, lanceolate, or linear. 



1 O. LAXIF LORDS (Desf. cor. p. 83. t. 62. arm. mus. par. 12. 

 p. 57. t. 8.) plant villous; leaflets ovate, acute, with parallel 

 nerves ; stipulas unequally ovate-sagittate, rather larger than 

 the leaflets ; racemes axillary, few-flowered ; calycine segments 

 nearly equal, setaceously-subulate, much longer than the tube, 

 but much shorter than the corolla ; legumes compressed, villous, 

 many-seeded. 1. H. Native of Candia. Flowers violaceous. 



Loose-flowered Bitter- Vetch. Fl. May, Jul. Clt. 1820. PI. 1 ft. 



2 O. HIKSUTUS (Lin. spec. 1027.) plant hairy ; leaflets ovate, 

 acute, with parallel nerves ; stipulas unequally sagittate, lan- 

 ceolate, about the size of the leaflets ; racemes axillary, few- 

 flowered, longer than the leaves ; calycine segments nearly 

 equal, setaceously-subulate, much longer than the tube, but 

 much shorter than the corolla ; legume compressed, hairy. 

 Tj. . H. Native of Thrace. Sims, bot. mag. 2345. Buxb. cent. 

 3. p. 22. t. 41. Flowers red or purple. 



Far. j3, glabriusculus (Ser. mss. in D. C. prod. 2. p. 376.) 

 stems, leaves, and peduncles quite smooth ; calyx pilose. I/ . H. 

 Native of Tauria. 



Hairy Bitter- Vetch. Fl. May, June. Clt. 1822. PI. 1 ft. 



3 O. FORMOSUS (Stev. mem. soc. mosq. 4. p. 50. Lin. soc. 

 trans. 11. p. 413. t. 36.) plant quite smooth ; leaflets ovate, mu- 

 cronulate ; stipulas small, semi-sagittate, acute, denticulated, 

 with diverging nerves ; peduncles axillary, usually 2-flowered, 

 longer than the leaves ; calycine segments lanceolate, length of 

 tube, but much shorter than the corolla ; legumes lanceolate, 

 glabrous. %. H. Native of the alps of Caucasus. Corollas 

 beautiful purple, about the size of those of O. virnus. 



Far. /3, microphyllus (Ser. mss. in D. C. prod. 2. p. 377.) 



leaflets roundish, much smaller ; stipulas hardly toothed. I/ . H. 



Beautiful Bitter- Vetch. Fl. May, Jul. Clt. 1818. PI. | ft. 



4 O. LATHYROiDEs(Lin. spec. 1027.) plant smoothish ; leaflets 

 ovate, mucronate, with divaricate nerves ; stipulas semi-sagit- 

 tate, a little toothed, smaller than the leaflets ; peduncles many- 

 flowered, axillary, about equal in length to the leaves ; calycine 

 teeth shorter than the tube ; legumes compressed, glabrous, 2-3- 

 seeded. I/. H. Native of Siberia. Amm. ruth. 151. t. 7. f. 2. 

 Stems branched a little. Flowers crowded, of a beautiful blue 

 colour, usually 3 or 4 racemes standing together. An elegant 

 plant, with broad, shining leaflets and black roots. 



Lathyrus-like Bitter- Vetch. Fl. Ju. Jul. Clt. 1758. PI. 1 to 2 ft. 



5 O. SESSILIFLORUS (Smith, in Rees' cycl. vol. 25.) root creep- 

 ing, branched ; stems weak, undivided, angular, but not winged ; 

 leaflets narrow, almost linear, nearly sessile ; stipulas very 

 narrow, semi-sagittate, entire ; racemes few-flowered. 3/ . H. 

 Native country unknown. Flowers purple. 



Sessile-flowered Bitter- Vetch. PI. ^ to 1 foot. 



6 O. FISCIIE'RI (Sweet, fl. gard. t. 289.) stem tetragonal, almost 

 simple, smoothish ; leaflets linear, bluntish, mucronulate, nerved 

 lengthwise, rather silky beneath ; stipulas linear, acute, a little 

 toothed, with one auricle at the base ; racemes pedunculate, 

 many-flowered ; flowers secund ; legumes reticulately veined, 

 6-7-seeded. I/. H. Native of Siberia. O. atropurpureus, 

 Fisch. in litt. but not of Desf. Flowers large, beautiful purple. 



Fischer's Bitter- Vetch. Fl. May, Jul. Clt. 1827. PI. 1 ft. 



7 O. QI-ADRA'NOULUS (Spreng. syst. 3. p. 258.) stem 

 simple, quadrangular ; leaves with 1 pair of linear, glabrous 

 leaflets ; stipulas semi-sagittate, setaceous ; peduncles many- 

 flowered ; flowers secund. 1. H. Native of Sicily. 



Quadrangular-stemmed Bitter- Vetch. PI. 1 foot. 



2. Leaves with many pairs of broadish leaflets. Stipulas 

 much smaller than the leaflets. 



8 O. VE'RNUS (Lin. spec. 1028.) plant rather pubescent ; stems 

 simple, flexuous ; leaves with 2-3 pairs of ovate-lanceolate, 

 acuminated, shining leaflets, with rather parallel nerves ; sti- 

 pulas semi-sagittate, entire ; peduncles axillary, many-flowered, 

 shorter than the leaves ; flowers secund, nodding ; calycine seg- 

 ments broad, hardly the length of the tube, lower one longest ; 

 legumes rather compressed, obliquely and reticulately veined, 

 many-seeded; style jointed ; seeds roundish, smooth. l/.H. 

 Native of Europe, in groves, in many parts, particularly in the 

 south. Sturm, deutschl. fl. 7. with a figure. Curt. bot. mag. 

 521. Riv. tetr. irr. t. 58. Schmidel, t. 59. f. 79. Flowers 

 handsome, singular in the different shades of colour, the upper 

 part of the vexillum is purple, with blood-red veins ; the wings 

 blue, and the keel is blue tinged with green ; the colours change 

 as the corolla advances, and becomes blue. The roots are black. 



Far. ft, luscifoliu.'i (Ser. mss. in D. C. prod. 2. p. 377.) leaflets 

 stiff, elongated, taper-pointed. O. ruscifolius, Willd. in herb. 

 Desf. ex Poir. suppl. 4. p. 203. 



Far. -/jflaccidus (Ser. mss. in D. C. 1. c.) leaflets very narrow 

 and flaccid, y.. H. Native of Croatia and Switzerland. 



Spring Bitter- Vetch. Fl. Mar. April. Clt. 1G29. PL | to 1 ft. 



9 O. VENOSUS (Willd. herb, ex Link. enum. 236.) stem sim- 

 ple ; leaves with 2 pairs of lanceolate, taper-pointed leaflets, 

 with divaricate veins ; stipulas semi-sagittate ; racemes few- 

 flowered, y. . H. Native of Siberia. Gmel. fl. sib. t. 5. f. 1. 

 Flowers blue and veined with purple. 



Feiny-Rowered Bitter-Vetch. FL May, Ju. Clt. 1820. PL 1 ft. 



10 O. ALPE'STRIS (Waldst. et Kit. hung. 2. p. 133. t. 126.) 

 plant glabrous ; stems angular, simple ; leaves with 2-3 pairs 

 of oblong-lanceolate, acuminated leaflets, with somewhat parallel 

 nerves ; stipulas semi-sagittate, entire, or toothed ; peduncles 

 axillary, many-flowered, about equal in length to or a little longer 

 than the leaves ; flowers secund, nodding ; calycine segments 

 broad, hardly the length of the tube ; legumes rather compres- 

 sed : style hooked ; seeds roundish, brown. Tf.. H. Native of 

 Hungary. Flowers purple, having the vexillum veined with 

 crimson, fading to blue. 



Alp Bitter- Vetch. Fl. June, Jul. Clt. 1817. PL 1 to 2 ft. 



11 O. MULTIFLORUS (Sieb. in fl. 1821. p. 97.) stem almost 

 simple ; leaves with 3-4 pairs of ovate, acuminated leaflets ; 

 stipulas semi-sagittate ; peduncles elongated, incurved, many- 

 flowered. I/. H. Native of Italy, near Naples. Flowers 

 pale red, about the size of those of O. niter, 



Many-jnoneredBitter-Vetch. Fl.My.Jul. Clt.1820. Pl.ltoSft. 



12 O. VARIEGA'TUS (Tenore, prod, suppl. 1. p. 62. and cat. 

 1819. p. 57. fl. neap. t. 68. but not of Lapeyr.) plant pilose; 

 stems simple, flexuous ; leaves with 2-3 pairs of lanceolate, 

 acuminated leaflets, with parallel nerves ; stipulas ovate, semi- 

 sagittate, quite entire, acute, much smaller than the leaflets ; 

 calycine segments narrow, acute, length of tube ; legumes com- 

 pressed, nerveless, dotted ; style straight. 1.H. Native near 

 Naples, in woods. Column, phytob. p. 59. with a figure. O. 

 serotinus, Presl. according to Gussone in litt. Flowers purple 

 and variegated. 



Fariegated-ftowered Bitter-Vetch. Fl Ju.Jul. Clt.1821. PL 1ft. 



13 O. VICIOIDES (D. C. prod. 2. p. 377.) plant smoothish ; 

 stems simple, flexuous ; leaves with 2-3 pairs of ovate-lanceolate, 



