Teucrium wightii
Content
Description
Erect annual, 0.5-1 m.
Leaves chartaceous, narrowly elliptic to ovate, 6-9 by 2-4 cm, serrulate, bluntly acute, base truncate or cordate, often oblique;
Distribution
Asia-Tropical: India present; Thailand (Thailand present), Gajo Lands present, Kwantung present, N. Sumatra present, Takengon present
India, Thailand, to Kwantung; in Malesia: N. Sumatra (Gajo Lands: Takengon), one collection.
Notes
I have earlier referred the N. Sumatran plant to T. quadrifarium HAM. ex D.DON. Closer study showed that Asian material distributed under the latter name is often not homogeneous. Following HOOKER'S interpretation of DON'S species shows that this is clearly distinct from the Sumatran plant by the very much larger, broader bracts broadly rounded or almost truncate at base, which especially at the tips of racemes conceal the flowers and are neatly arranged in a 4-ranking strobiloid shape, DON saying: "bracteae cordatae, acuminatae, foliaceae, quadrifariam imbricatae".
It seems that the N. Sumatran material is best arranged with T. wightii, which was originally described from the Nilghiries; but I saw at Leiden matching material from Thailand and Kwantung, and still other localities may turn up among erroneously named T. quadrifarium.
It seems that the N. Sumatran material is best arranged with T. wightii, which was originally described from the Nilghiries; but I saw at Leiden matching material from Thailand and Kwantung, and still other localities may turn up among erroneously named T. quadrifarium.