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| Artocarpus rubrosoccatus E.M. Gardner, A. Chaveerach, and N.J.C. Zerega
in Gardner, Chaveerach, Sudmoon & Zerega, 2020.
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Abstract
Recent taxonomic work on Artoarpus has revealed two undescribed species from Thailand and Vietnam. Artocarpus rubrosoccatus, endemic to peninsular Thailand, resembles A. lacucha but is distinguished by its deep red clavate staminate inflorescences. Artocarpus montanus is found in the montane regions of southern and central Vietnam, and perhaps also in Thailand. This species resembles the vegetative parts of A. lowii and A. excelsus, but A. montanus differs in its longer syncarp processes and its geographic distribution. The vast majority of Artocarpus species are found in tropical lowlands, and A. montanus, along with A. excelsus, represent the only known members of the genus that are restricted to montane habitats. The provisional conservation assessment of both new species is Near Threatened, because although their known areas of occupancy are restricted, both occur in protected areas.
Keywords: Eudicots, Moraceae, Artocarpus, Thailand, Vietnam, crop wild relatives
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| FIGURE 1. Drawing of Artocarpus rubrosoccatus showing (A) leafy shoot with staminate inflorescences; (B) staminate flower and peltate bract; (C) pistillate inflorescence and flower; and (D) syncarp.
Drawn by EMG from S. Gardner et al. ST1738 (A, D), S. Phusomsaeng 196 (B), and S. Gardner & P. Sidisunthorn ST2740 (C).
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| FIGURE 3. Artocarpus rubrosoccatus, showing (A) habit, (B) leafy shoot with young pubescent leaves, (C) immature staminate inflorescences, (D) bark slash with exudate, (E) leaf margin, (F–G) syncarps, and (H) syncarp on leafy shoot.
Photographs by NJCZ; voucher N. Zerega 517 deposited at CHIC and KKU.
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Artocarpus rubrosoccatus E.M. Gardner, A. Chaveerach, and N.J.C. Zerega, sp. nov.
Differt ab A. lacucho Roxb. ex Buch.-Ham. inflorescentiis masculis clavatis rubris profundis.—Differs from Artocarpus lacucha Buch.-Ham. ex Roxb. in the deep red clavate staminate inflorescences.
Etymology:—The epithet comes from the Latin rubro-(red) and soccus (slipper, antecedent of the English “sock”) and may be loosely translated “red-socked”, referring to the staminate inflorescences that resemble a pair of feet in red socks.
Vernacular name:— Ma-hat khang-khok. ?มะหาดคลองสก
Vernacular name:— Ma-hat khang-khok. ?มะหาดคลองสก
Artocarpus montanus E.M. Gardner and N.J.C. Zerega, sp. nov.
Differt ab A. lowii King et A. excelso F.M. Jarrett syncarpii processis longiis.—Differs from Artocarpus lowii King and A. excelsus F.M. Jarrett in the longer syncarp processes.
Etymology:— The epithet reflects the montane habitat of Artocarpus montanus.
Elliot M. Gardner, Arunrat Chaveerach, Runglawan Sudmoon and Nyree J.C. Zerega. 2020. Two New Species of Artocarpus (Moraceae) from Thailand and Vietnam. Phytotaxa. 453(3); 265–274. DOI: 10.11646/phytotaxa.453.3.8
