Tuesday, March 21, 2023

[Botany • 2018] Hornstedtia garbosa (Zingiberaceae: Alpinieae) • A New Species from Mindanao, Philippines

Hornstedtia garbosa Naive & Alejandro,

in Naive & Alejandro, 2018. 

Hornstedtia garbosa Naive & Alejandro, a new endemic species from southern Philippines, is here described and illustrated. This new species is comparable to H. microcheila Ridl. and H. sanhan M.F. Newman but distinct by its obovate labellum which is white with a red centre. Information on habitat and ecology as well as notes on its similarity to other probably allied species of the genus are provided. An identification key to the five recognized Philippine Hornstedtia species is also included. 

Key words: Alpinioideae, Hornstedtia, Northern Mindanao, Philippines, Zingiberales

Hornstedtia garbosa Naive & Alejandro sp. nov.  

Diagnosis: Hornstedtia garbosa is closely similar to Hornstedtia microcheila but differs significantly in having scarlet red corolla lobes, white with red along centre, obovate labellum and a broader, bright red involucral bracts. It is also allied to Hornstedtia sanhan of Vietnam, however, it is distinct in the shape of the lip, and in having an involucral bracts with glabrous margins and sharply pointed apex.

Etymology: From the Bisaya dialect in the Philippines, which means beautiful, elegant, attractive, and jaunty, alluring to the inflorescence of this delightful Zingiberaceae species; noun in apposition. 

Vernacular name: Pinoon, Tagbac (local people in the type locality).

Distribution: Endemic to the Philippines. It has only been recorded so far in northern Mindanao on Sitio Lantawon, Aposkahoy, Claveria, Misamis Oriental. 

 Ecology: Found growing in stony banks in degraded primary forest with dark and humid environment along the river at elevation of 1,115–1,120 m asl. 


  Mark Arcebal K. Naive and Grecebio Jonathan D. Alejandro. 2018. Hornstedtia garbosa (Zingiberaceae: Alpinieae), A New Species from Mindanao, Philippines.  Phytotaxa. 347(2); 183-188. DOI: 10.11646/phytotaxa.347.2.6