Torenia hookeri (C.B.Clarke ex Hook.f.) A.Pal & M.Chowdhury

Pal, Aaratrik & Chowdhury, Monoranjan, 2022, Torenia hookeri, a new combination in Asian Linderniaceae and first record of T. godefroyi in the Himalayan hotspot, Phytotaxa 549 (2), pp. 230-234 : 230-231

publication ID

https://doi.org/ 10.11646/phytotaxa.549.2.8

DOI

https://doi.org/10.5281/zenodo.6625709

persistent identifier

https://treatment.plazi.org/id/039C87F1-FFBC-6271-FF33-599B40F6FEE4

treatment provided by

Plazi

scientific name

Torenia hookeri (C.B.Clarke ex Hook.f.) A.Pal & M.Chowdhury
status

comb. nov.

Torenia hookeri (C.B.Clarke ex Hook.f.) A.Pal & M.Chowdhury View in CoL comb. nov.

Vandellia hookeri C.B.Clarke ex Hooker (1884: 280) View in CoL . ≡ Lindernia hookeri (C. B.Clarke ex Hook.f.) Wettst. View in CoL in Engler & Prantl (1891: 80). ≡ Pyxidaria hookeri (C.B.Clarke ex Hook.f.) Kuntze (1891: 464) View in CoL .

Lectotype:— INDIA. Khasia: below Pomrang , cultivated field, 2–4000 ft., 2 October 1850, J.D. Hooker & T.Thomson 10 ( K [ 000859668 !]) . ( Fig. 1 View FIGURE 1 )

Annual herbs up to 35 cm tall. Stem green (or reddish), erect or ascending, hispid, 4-angular. Leaves shortly petioled or sessile, petiole up to 5 mm, lamina ovate-lanceolate, 17–28 × 7–15 mm, sometimes narrowed in middle, pinnately veined, acute, cuneate to sub-cordate, serrate; serration 3–10 pairs, with bristles on apices. Pedicels axillary-solitary, racemes or subumbel-like at branch apices, 5–15 mm in flowers, 9–25 mm in fruits, quadrangular. Calyx green, distinctly 5-winged, densely ciliate, bi-lipped, upper lip 3-lobed, lower lip bi-lobed, 4–5 mm long in flowers, 6–7 mm long in fruits. Corolla ca. 8 mm long, purple or violet, tube whitish-yellow, bilabiate, upper lip emarginate, lower lip 3-lobed, lobes rounded, middle lobe shows a yellow spot surrounded by a whitish patch. Stamens 4, perfect, pale purple, united as pairs at theca; upper pair of filaments shorter, theca larger, ca. 1.5 mm long; lower pairs of filaments longer, ca. 2.5 mm long, with tooth-like purple appendage, ca. 0.3 mm, theca minute. Ovary green, linear-oblong, ca. 2 mm long, slightly bend at apical half, glabrous expect scabrid apical lateral half. Disk greenish yellow, ca. 0.3 mm, covering ca. 1/6th of the ovary from base. Fruit completely enclosed by calyx. Seeds irregular in shape with rounded pits on surface (bothrospermous).

Notes:— T. hookeri can be easily distinguished from other Torenia by the size of the densely hairy calyx and purple or violet corolla with a yellow spot surrounded by a whitish patch on the lower lip.

Phenology:— Flowers and fruits recorded in October–November.

Distribution, habitat and ecology:— The species is recorded from China, India (Bihar, Jharkhand, Madhya Pradesh, Meghalaya (Khasi Hills), West Bengal), Myanmar, Nepal, Thailand, and Vietnam. The authors observed it in open lands of moist habitats with several marshy herbs and grasses. It’s also recorded to be grown on cultivated fields.

Additional specimens examined:— INDIA. Khasia: below Pomrang, cultivated field, 2–4000 ft., 2 October 1850, J.D. Hooker & T. Thomson 10 (BM, CAL, K, P); West Bengal: Darjeeling district, Siliguri, Raja Rammohunpur, 26°42′38.50″N, 88°21′12.60″E, 06 Nov 2020, LIND 20201106 (NBU); Jharkhand: Chotanagpur, Parasnath, 17 November 1874, C. B. Clarke 24749C (CAL); Madhya Pradesh: Kanha National Park, November 1970, R.M. Singhal (DD). CHINA. Yunnan, 19 July 1898 (P). NEPAL. Pokhara, 3000 ft., 12 August 1954, Stainton, Sykes & Williams 6767 (E); Western Development Region: Gandaki zone, Gorkha district, 28°2′36″N, 84°48′40″E, 860 m, 23 July 2008, Ekeda et al. 20811019 (E). MYANMAR. Pegu, Yomah, Eng Forests, S. Kurz 301 (CAL); Yomah, E. and W. slopes, 29 December 1870, S. Kurz 2300 (CAL); Pegu, 29 December 1871, S. Kurz 2300 (CAL); Pegu, 26 December 1871, S. Kurz 2305 (CAL). VIETNAM. Cochinchina, Thorel 1587 (P); Tonkin, 04 February 1908 (P).

B

Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien Universitaet

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Lamiales

Family

Linderniaceae

Genus

Torenia

Loc

Torenia hookeri (C.B.Clarke ex Hook.f.) A.Pal & M.Chowdhury

Pal, Aaratrik & Chowdhury, Monoranjan 2022
2022
Loc

Pyxidaria hookeri (C.B.Clarke ex Hook.f.)

Kuntze 1891: 464
1891
Loc

Vandellia hookeri C.B.Clarke ex Hooker (1884: 280)

C. B. Clarke ex Hooker 1884: 280
1884
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