Crotalaria calycina Schrank (1817: 12)

Ninkaew, Sakuntala, Balslev, Henrik, Pornpongrungrueng, Pimwadee & Chantaranothai, Pranom, 2017, Crotalaria L. (Fabaceae: Faboideae) in continental Southeast Asia, Phytotaxa 320 (1), pp. 448-450 : 448-450

7. Crotalaria calycina Schrank (1817: 12) . Type:— Plate 12 in Schrank, Plantae Rariores Horti Academic Monacensis 1817; seeds obtained from Schreber’s Herbarium of a plant cultivated at Munich, Germany (M n.v.).

Herb, erect, 40–70 cm high; young branches terete, brown sericeous. Leaves simple. Stipules narrowly linear, 3–5 mm long, brown sericeous, caducous. Petioles 2–4 mm long, brown sericeous. Lamina lanceolate, linear or oblong, 2.8–13.5 × 0.3–1.5 cm, base cuneate or obtuse, apex acute, margin entire, glabrous upper, sericeous lower; lateral veins 7–9 pairs. Inflorescences axillary, open short 1–2 flowered racemes and terminal many-flowered racemes, 5–18 cm long; peduncle 0.3–3 cm long, brown sericeous. Bracts cordate, 7–15 × 2–4 mm, persistent. Pedicels 0.4–1 cm long, brown villose. Bracteoles inserted distally on the pedicel, cordate, 5–15 × 1–2 mm, persistent. Calyx 2–2.7 cm long, campanulate, bilabiate; tube 0.7–1 cm long; lobes lanceolate or obovate, 18–25 × 3–10 mm, glabrous inside, brown villose outside. Corolla yellow. Standard: claw 2–2.7 mm long, glabrous, margin white tomentose; blade obovate, 13–18 × 8–10 mm, base truncate, apex emarginate, brown pubescent, margin glabrous. Wings: claw 2.7–3 mm long, glabrous except the margin white puberulous; blade oblanceolate, 13–14 × 3–4 mm, base oblique, apex acute, margin glabrous. Keel: claw 1.5–2 mm long, glabrous except the margin white pubescent; blade lanceolate, 18–19 × 6–8 mm, beak spirally twisted, base cuneate or obtuse, apex attenuate, margin white pubescent. Stamens: filaments fused for proximal 5–6 mm, free for distal 5–9 mm; anthers either narrowly linear, 1.8–2.5 mm long or elliptic, ca. 1 mm long. Ovary with 0.5–1 mm long stipe, oblanceolate or oblong, 5.5–6 mm long, glabrous; style 15–16 mm long, adaxially white pubescent in a single line along the entire edge, abaxially glabrous. Pods with 2.5–3 mm long stipe, oblong, 23–27 × 5–6 mm, black-brown, glabrous. Seeds harp-shaped, 1.5–2 × 2.5–3 mm, brown.

Representative specimens: — CAMBODIA. Banteay Meanchey: between Thma Puok and Banteay Chhmar , 24 October 1927, Poilane 14318 ( P) . LAOS. Vientiane: Ban Huai Yang , 1 October 1998, Lamxay et al. 280 ( FOF) . Xiang Khouang: September 1917, Mieville 37257 ( P) . MYANMAR. Tong Dong: 1826, Wallich 5364 ( K) . Magway: along the unpaved road between Te Gong village and Long She village , 9 September 2013, Fujikawa 95267 ( QBG) . THAILAND. Chiang Mai: Mae Rim , 30 August 1994, BGO Staff 1479 ( QBG) . Chiang Rai: Mae Fa Luang , 8 November 2009, Maxwell 09-289 ( QBG) . Chaiyaphum: Phu Khieo , October 1999, Phengklai et al. 12308 ( BKF) . Chon Buri: Si Racha , 30 November 1927, Collins 1869 ( BK) . Kanchanaburi: Erawan National Park , 1 November 2003, Bult 709 ( BKF) . Loei: Na Haeo , 5 November 1995, BGO Staff 42 ( QBG) . Nan: 16 November 1993, Larsen 44441 ( AAU, BKF) . Phetchabun: Nam Nao National Park , 24 November 2013, Ninkaew 260 ( KKU) . Saraburi: Ban Nong Bua , 27 September 1927, Put 1090 ( ABD, BK) . VIETNAM. Gia Lai: An Khe , 25 December 1977, Binh B 345 ( HNU) . Lam Dong: Da Lat, 17 October 1924, Evrard 1455 ( K, P) . Lang Son: Huu Lung , 12 October 1964, Chi Sam 87 ( HNU) . Lao Cai: 10 December 1935, Poilane 25015 ( P) . Ninh Binh: November 1926, Petelot 4001 ( P) & 4002 ( P). Ninh Thuan: Phan Rang-Thap Cham, Cana , 2 November 1925, Evrard 2384 ( P) . Kon Tum: Dak To , 20 November 1946, Poilane 35561 ( K, L, P) .

Distribution: —Asia ( India, Sri Lanka, Myanmar, China, Thailand, Laos, Cambodia, Vietnam), Australia. ( Figure 6 ).

Ecology: —Deciduous dipterocarp and dry evergreen forests, elevation 12–1500 m.

Notes: —The diagnostic characters of C. calycina are the cordate bracts, oblanceolate wings and stipitate ovary and pods.

Figures

FIGURE 6. Distribution map of Crotalaria calycina in continental Southeast Asia.