Crotalaria albida Roth vs Crotalaria linifolia L.f.

[J.M. Garg]

Due to confusion in images in our site, I am trying to find the difference between the two:

Crotalaria albida Roth

Crotalaria linifolia L.f.

From Flora of China: Herbs, short-lived or perennial, erect to ascending, 10-80 cm tall. Stems sometimes branched above base, occasionally branched only at base, appressed pubescent to spreading pilose. Stipules acicular, minute, caducous, sometimes apparently ab­sent. Leaves simple, subsessile; leaf blade oblanceolate, elliptic, or obovate, 1-2.5 × 0.4-1.2 cm, abaxially strigose, adaxially glabrous, base cuneate, apex obtuse and mucronate. Racemes terminal, often on lateral branches, rarely leaf-opposed, to 20 cm, 20-30-flowered; bracts filiform, ca. 1 mm. Pedicel 3-5 mm; bracteoles inserted at base of calyx tube, similar to bracts. Ca­lyx 2-lipped, 4-8 mm, parted; abaxial 3 lobes lanceolate; adax­ial 2 lobes broader, falcate, apices slightly obtuse to acuminate. Corolla pale yellow; standard elliptic, 5-8 mm, base with appendages, apex barbate; wings oblong, ± as long as standard; keel rounded, narrowed apically from middle and extended into a twisted beak. Ovary subsessile. Legume cylindric, ca. 1 cm, slightly exserted beyond calyx, 6-12-seeded, glabrous. Fl. May-Sep, fr. Sep-Dec. From IBP:  Diffuse herbs; branches radiating from a perennial stout root stock. Leaves to 1.5 x 0.5 cm, oblanceolate, obtuse, hairy below. Racemes to 6 cm long, terminal; bracts and bracteoles minute. Flowers 10 mm long, yellow; calyx 9 mm long; lobes unequal; standard 8 mm across, orbicular, hairy on back; wings 8 x 3 mm, rugose; keel glabrous. Pods 9 x 3 mm, obovate, glabrous; seeds few.  From Flora of Pakistan: An undershrub c. 30-60 cm tall, branches silky pubescent. Leaf simple, c. 2.5-5.5 cm long, c. 4.5-13 mm broad, linear-oblong or oblanceolate, obtuse, apiculate, silky pubescent, pellucid-punctate; petiole 2.5 mm or less; stipules absent. Inflorescence a 6-20-flowered raceme, c. 5-13 cm long. Bract and bracteoles linear. Pedicel c. 3-5 mm long. Calyx c. 6-7 mm long, becoming enlarged in fruit; 3 lower teeth linear, the upper 2 broader. Corolla pale yellow. Vexillum c. 8-9 mm long. Fruit sessile, c. 1.2-1.6 cm long, oblong-cylindric, glabrous, 6-12-seeded.

From Flora of China: Herbs, annual or short-lived perennial, erect to ascending, 0.5-1 m tall. Stems terete, densely silky pubescent. Stipules minute, caducous. Leaves simple; petiole short; leaf blade linear to oblong, 2-5 × 0.3-1.5 cm, both surfaces silky pilose, adaxi­ally sometimes only along midvein, base cuneate to rounded, apex acuminate to obtuse and mucronate. Racemes terminal, lax, 10-20 cm, many flowered; bracts lanceolate, 2-3 mm. Pedicel to 2.5 mm; bracteoles inserted at base of calyx, similar to bracts. Calyx 2-lipped, 6-7 mm, deeply divided, densely rusty pilose; abaxial lobes lanceolate; adaxial lobes slightly longer and broader Corolla yellow with darker veins; standard oblong to suborbicular, 5-7 mm, margin pilose at base and with 2 appendages, apex retuse; wings oblong, 6-7 mm; keel ca. 8 mm, ± sharply angled near base, margins minutely woolly, apex extended into a long straight twisted beak. Legume rhombic to ovoid, 5-6 mm, 8-10-seeded, glabrous; stipe almost absent. Fl. Aug-Oct, fr. Nov-Dec. From IBP: Much branched herbs, up to 50 cm high; stems terete, pubescent. Leaves simple, 1.0-2.3 x 0.4-1.2 cm, oblong-obovate or obovate, cuneate at base, obtuse, rounded or retuse and slightly mucronate at apex, glabrous or glabrescent above, sericeo-pubescent beneath, margins involute, lateral nerves 3-6 pairs; subcoriaceous, up to 2.5 cm long; petioles 0.5-1.5 mm long, pubescent; stipules absent. Racemes terminal; peduncles 2-9 cm long, stout with few extra bracts. Flowers 3-7, 1.3-1.4 cm across; pedicels 2-3 mm long, pubescent, stout; bracts linear, 1.0-1.5 mm long pubescent; bracteoles 2, linear, ca 1.5 mm long, with few hairs. Calyx 5-lobed, tube ca 2 mm long, lobes 10.5-11.0 x 1-3 mm, piloso-pubescent, margins ciliate, 2-lipped, upper lip 2-lobed, lobes oblong-lanceolate, subacute at apex, divided to less than one fourth of its length, lower lip 3-lobed, lobes linear-lanceolate, acuminate at apex, divided to more than half of its length. Petals pale-yellow, equal to calyx or rarely very scarcely exserted; standard orbicular, 9-10 x 8-10 mm, retuse at apex, glabrous, claw 1.5 mm long, woolly; wing petals obovate or oblong, 8-10 x 2.5-3 mm, obtuse at apex, ridges to about half of its breadth, claw 1.0-1.5 mm long, woolly; keel petals ovate, 12.5-13.0 x ca 4.5 mm, margins ciliate, beak ca 4.5 mm long, straight, twisted. Staminal sheath 3-4 mm long; free filaments 2.5-5.0 mm long; anthers dimorphic, longer anthers linear-oblong, 2.5-3.0 mm long; shorter anthers, ovoid, 0.5-1.0 mm long. Ovary subsessile, oblong, ca 5 x 1 mm, narrowed above, glabrous; style 10-11 mm long, pilose throughout the length; stigma flat; ovules 22-44. Pods sessile, oblong, 1.3-1.5 x 0.6-0.7 cm, glabrous, brown; seeds 10-20.

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With regards,
J.M.Garg

[Mandru Ramesh Chowdary]

Thank you for the detailed explanation Garg sir..!

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