Crotalaria kurzii Baker ex Kurz (1873: 229)

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

20. Crotalaria kurzii Baker ex Kurz (1873: 229) . Type (lectotype designated by Ansari 2008):— MYANMAR. Bago

(Pegu), without date, Kurz 1664 (lectotype CAL n.v., isolectotype K000591131 !) .

= Crotalaria peguana Bentham ex Baker (1876: 77) Type:— MYANMAR. Bago (Pegu), no date, MacLelland s.n. (holotype K000591128 !).

Herb, erect, 0.5–1.5 m high; young branches terete, brown pubescent. Leaves simple. Stipules narrowly linear, 0.5–1 mm long, caducous. Petioles 2–5 mm long, pubescent. Lamina obovate, oblanceolate or ovate, 1.5–11 × 0.5–3.7 cm, base cuneate, apex acute, margin entire, both surfaces brown puberulous; lateral veins 5–9 pairs. Inflorescences terminal open racemes up to 20 cm long or axillary with 1–2 flowers and 3 cm long; peduncle 1–2 cm long, brown pubescent. Bracts narrowly linear, 1.5–4.5 mm long, persistent. Pedicels 4–5 mm long, brown pubescent. Bracteoles inserted distally on the pedicel, narrowly linear, 2–3 mm long, persistent. Calyx 1–1.3 cm long, campanulate, bilabiate; tube 2–3 mm long; lobes triangular, 8–10 mm long, glabrous inside, brown pubescent outside. Corolla yellow. Standard: claw 2–2.2 mm long, glabrous, margin white tomentose; blade elliptic, 9–10 × 7–8 mm, base truncate, apex obtuse or acuminate, margin glabrous. Wings: claw 1.5–2 mm long, glabrous; blade oblong, 7–8 × 2.5–3 mm, base oblique, apex obtuse, margin glabrous. Keel: claw 1.5–2 mm long, glabrous; blade ovate, 9–10 × 4–5.5 mm, beak spirally twisted, base cuneate, apex attenuate, margin white tomentose. Stamens: filaments fused for proximal 3–3.5 mm, free for distal 3–5 mm; anthers either narrowly linear, 1.5–1.8 mm long or elliptic, 0.5–0.8 mm long. Ovary sessile, oblong, 3–3.5 mm long, glabrous; style 9–10 mm long, adaxially white pubescent in a single line along the distal edge, abaxially glabrous. Pods sessile, oblong, 1.8–2 × 0.4–0.5 cm, brown, glabrous. Seeds reniform, 2–2.5 × 1.8–2 mm, brown-black.

Representative specimens: — LAOS. Oudomxay: Xay, Nam Veng Village , 29 October 2012, Khantheo & Phonesavanh OX 0628 ( HNL) . MYANMAR. Bagan ( Baugoon ): Lelland s.n. ( K) . Bago (Pegu), 4 July 1906, Lace 2873 ( K) . Shan State: Pin Luang Forest Station, Pin Luang Township , 10 December 2014, Srisanga M 1-86 ( QBG) . Taungoo ( Toungoo ): 22 December 1909, Lace 5035 ( K) . THAILAND. Chiang Mai: Doi Chiang Dao Wildlife Sanctuary , 27 September 1971, Vidal 5226 ( AAU, BKF) . Chiang Rai: Mae Sai, Tham Luang-Khun Nam Nang Non Forest Park, 13 February 2012, Norsaengsri & Tathana 8925 ( QBG) . Kanchanaburi: Thong Pha Phum , 14 December 1993, Parinya & Santi 356 ( BK) . Lampang: Doi Khun Tan National Park , 30 October 1977, Nasongkhla 352 ( BCU) . Mae Hong Son: Wat Tham Wua , 4 February 2014, Norsaengsri 10696 ( QBG) . Nan: Doi Phu Kha National Park , 15 November 2001, Srisanga 2275 ( BKF, QBG) . Phayao: Doi Luang National Park , 4 November 2015, Muangyen 287 ( QBG) . Tak: Thung Yai Naresuan Wildlife Sanctuary , 6 October 2014, Ninkaew 285 ( KKU) . Uthai Thani: Huai Kha Khaeng Wildlife Sanctuary , 12 November 1979, Shimizu et al. T-22432 ( BKF) . VIETNAM. Lam Dong: Da Lat , 29 July 1911, Lecomte & Finet 1191 ( P) . Son La: Moc Chau , 26 October 1961, Khoi 929 ( HNU) .

Distribution: —Asia ( Myanmar, China, Thailand, Laos, Vietnam). ( Figure 12 ).

Ecology: —Open places in dry evergreen forest, elevation 26–1500 m.

Notes: — Crotalaria kurzii is distinguished by its obovate, oblanceolate or ovate leaves and terminal or axillary inflorescences with 1–2 flowers.

Figures

FIGURE 12. Distribution map of Crotalaria kostermansii and C. kurzii in continental Southeast Asia.