Strobilanthes brandisii T. Anderson

Kladwong, Pornchai & Chantaranothai, Pranom, 2024, Notes on Strobilanthes (Acanthaceae) with capitate inflorescences in Thailand, PhytoKeys 244, pp. 89-126 : 89-126

3. Strobilanthes brandisii T. Anderson , J. Linn. Soc., Bot. 9: 475. 1867.

Figs 1 , 10 A

Strobilanthes evrardii var. parviflora J. B. Imlay , Bull. Misc. Inform. Kew 1939 (3): 119. 1939. Type: Thailand, Ranong, Kraburi, Klong [Klawng] Wa, 50 m alt., 24 Dec 1928, Kerr 16335 (lectotype BM [ BM 000906338!] designated here; isolectotypes ABD [ ABDUH: 2 / 906 image!], K [ K 001514907!]), syn. nov.

Type.

Myanmar, Hills of E. Tonghoo, without date, Brandis 824 (lectotype CAL [ CAL 0000019781 image!] designated by Albertson and Wood 2012, pg. 54).

Distribution.

Myanmar, Thailand, Laos.

Ecology.

In partly shaded places of evergreen forest or mixed deciduous with bamboo; 10–1,531 m alt, flowering and fruiting from October to May.

Selected specimens examined.

Thailand, Northern: Mae Hong Son, Mae Tala, 1,376 m alt., 28 Apr 2014, Norsaengsri 10909 ( QBG); Chiang Mai, Doi Suthep-Pui NP, ca. 920 m alt., 19 May 1912, Kerr 2604 ( BM, E); ibid., Phrao, 1,050 m alt., 5 Dec 1990, Hansen 44621 ( CMU); Tak, Mae Sot, Khao Phra War, 695–800 m alt., 21 Jan 1983, Koyama et al. 32828 ( BKF, K, KYO- 2 sheets, L); Phitsanulok, Phu Hin Rong Kla NP, 1,300 m alt., 14 Oct 1998, Suksathan 1306 ( QBG); North-eastern: Loei, Phu Kradueng NP, 1,150 –1,250 m alt., 1 Nov 1984, Murata et al. 42628 ( BKF, L); ibid., Phu Luang WS, 980–1,531 m alt., 19 Feb 1983, Koyama et al. 33679 ( BKF, L), 33686 ( BKF, L); ibid., 19 Nov 2019, Kladwong 503 ( KKU); Eastern: Nakhon Ratchasima, Khao Yai NP, 1,170 m alt., 9 Oct 1979, Shimizu et al. 18097 ( BKF, K, KYO, L); South-western: Kanchanaburi, Si Sawat, Tham Than Lod NP, Khao Kamphaeng, 1,100 –1,370 m alt., 30 Nov 1982, Koyama et al. 30481 ( BKF, KYO); South-eastern: Chanthaburi, Khao Soi Dao, 1,100 –1,400 m alt., 12 Dec 1924, Kerr 9629 ( BK, BM, K); Trat, Khao [Kao] Kuap, 800 m alt., 24 Dec 1919, Kerr 17792 ( BK, BM, K); Peninsular: Chumphon, Ban Thung [Tung] Maha, 10 m alt., 10 Jan 1927, Kerr 11363 ( BK, BM); ibid., Lang Suan, 800 m alt., 22 Feb 1927, Kerr 12074 ( BK, K); Ranong, Kraburi, Klong [Klawng] Wa, 50 m alt., 24 Dec 1928, Kerr 16335 ( ABD, BM, K).

Preliminary conservation status assessment.

This species has an Extent of Occurrence ( EOO) of 303,322.469 km 2 and an Area of Occupancy ( AOO) of 56.000 km 2 and is assessed as Least Concern ( LC) following IUCN (2022).

Notes.

Strobilanthes brandisii is similar to S. consors C. B. Clarke in having decumbent habit, white sericeous obovate to oblanceolate or spathulate bracts and curved corolla. It differs in having an acute apex to the calyx lobes and linear bracts. Moreover, the bracts of S. brandisii are flat vs. curved in S. consors .

Kerr 16335 was mentioned as the type of S. evrardii var. parviflora ( Imlay 1939) . The type has three duplicates, one at each of ABD [ ABDUH: 2 / 906], BM [ BM 000906338] and K [ K 001514907]. BM 000906338 has Imlay ’ s handwriting as follows “ Strobilanthes evrardii R. Ben. var. parviflora J. B. Imlay Type no. of var. ”. Additionally, this specimen has a flower and the corolla length that agrees with the protologue. Therefore, the sheet BM 000906338 is selected as the lectotype.

We examined the type of S. evrardii var. parviflora and found it conspecific with S. brandisii .

Figures

Figure 1. Strobilanthes brandisii T. Anderson A stem and leaves B inflorescences C corolla, side view D corolla and stigma.

Figure 10. Distribution maps of Strobilanthes with capitate inflorescence in Thailand A S. aprica (Hance) T. Anderson, S. articulata J. B. Imlay and S. brandisii T. Anderson B S. capitata (Nees) T. Anderson, S. chiangdaoensis Terao and S. consors C. B. Clarke C S. cruciata (Bremek.) Terao, S. dimorphotricha subsp. rex (C. B. Clarke) J. R. I. Wood and S. echinata Nees D S. erecta C. B. Clarke, S. esquirolii H. Lév. and S. falconeri T. Anderson.