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ORÓBUS luteus.
Yellow Bitter Vetch.
Natural Order. L E G ÜM IN O SÆ . D C . prodr. 2. p . 93.
Subordol. PAPILIONACEÆ.— T r ib u s lN . ViClEÆ. Suprafol.194.
O R O B U S . Calyx campanulatus, 5-fidus, lobis 2 superioribus brevioribus.
Corolla papilionacea. Stamina diadelpba. Stylus gracilis linearis
apice villosus. Legumen cylindraceum oblongum 1-loculare bivalve poly-
spermum. Semina bilo lineari.— Herbæ erecta. Stipulæ semisagittatoe.
P etioli in setam brevem simplicem desmerites. Folia abrupte pinnata pau-
cijuga. Racemi axillares peduncnlati. DC . prodr. 2. p. 376.
O. luteus, glabriusculus, caule simplici anguloso, foliis 3-5-jugis, foliolis
elliptico-lanceolatis subtùs glaucis mucronulatis, stipulis semisagittatis
basi dentatis foliolis multò minoribus, pedunculis elongatis multilloris
folium vix aequantibus adscendentibus, calycibus glabriusculis : dentibus
inaequalibus brevibus,leguminibus compressis longitudinaliter reticulato-
venosis sessilibus, seminibus globosis variegatis. D C . prodr. 2. p . 378.
Orobus luteus. Linn. spec. 1028. Willd. sp. p i. 3. p . 1073. Pers. syn. 2.
p . 303. Hort. K ew . ed. 2. v. 4. p. 303. Spreng. syst. 3. p . 260.—
Gmel. sib. 4. p . 13. t. 4.
Root perennial. Stems erect, simple, or two or three
branches coming from thebase, angular, nearly smooth, orvery
slightly pubescent. Leaves pinnate, bearing from three to five
pair oif leaflets ; leaflets opposite, or rarely alternate, elliptically
lanceolate, terminated in a sharp soft mucrone, reticulately
veined, of a pale green, underneath slightly glaucous,
the nerves slightly pubescent. Petioles clothed with
weak spreading hairs, channelled on the upper side and
keeled on the lower, termmated in a small narrow leaf-like
appendage. Stipules semisagittate, lanceolate, taper-pointed,
more or less toothed, pubescent. Racemes several-flowered.
Flowers from orange to a pale straw-colour. Peduncle about
the length of the leaf, nearly smooth, angular. Pedicles short,
nodding. Calyx campanulate, slightly pubescent ; laciniæ
very unequal, two upper ones very short, and curved inwards
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