Strobilanthes articulata J. B. Imlay, 1939

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

2. Strobilanthes articulata J. B. Imlay , Bull. Misc. Inform. Kew 1939 (3): 121. 1939

Fig. 10 A

Type.

Thailand, Chanthaburi, Khao [Kao] Soi Dao, 12 Dec 1924, Kerr 9630 (lectotype BM [ BM 001191001!] designated here; isolectotypes ABD [ ABDUH: 2 / 887 image!], BK [257638!], C [ C 10005193 image!], K [ K 001096856!, K 001096857!], KYO!).

Distribution.

Endemic to Thailand.

Ecology.

In evergreen forest, often on rocks; 1,300 m alt, flowering and fruiting December.

Specimens examined.

Thailand, South-eastern: Chanthaburi, Khao Soi Dao, 1,300 m alt., 12 Dec 1924, Kerr 9630 ( BK, BM, K- 2 sheets, KYO).

Preliminary conservation status assessment.

This species is only known from its type locality and is assessed as Data Deficient ( DD) following IUCN (2022). More field work is needed to assess the conservation status of S. articulata .

Notes.

Strobilanthes articulata superficially resembles S. dimorphotricha Hance in having zigzag stems in the upper parts, strongly unequal leaf pairs and glabrous and caducous bracts, but it differs in having no bracteoles vs. present in S. dimorphotricha .

Strobilanthes articulata was described by Imlay (1939) based on Kerr 9630 which has seven duplicates. Two of which are at K [ K 001096856, K 001096857] and one at each of ABD [ ABDUH: 2 / 887], BK [257638], BM [ BM 001191001], C [ C 10005193] and KYO. BM 001191001 has Imlay ’ s handwriting as follows: “ Strobilanthes articulata Imlay Type no. ”, and it also has the mature fruit and corolla which correspond with the protologue. Therefore, we select it as the lectotype.

Figures

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.