Goniothalamus cheliensis

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Taxonavigation

Ordo: Magnoliales
Familia: Annonaceae
Genus: Goniothalamus

Name

Goniothalamus cheliensis Hu – Wikispecies link – Pensoft Profile

• Goniothalamus cheliensis Hu, Bull. Fan Mem. Inst. Biol. 10: 122 (1940). – TYPE: China: Che-Li Hsien, Maan-Shang, Yunnan, Sep. 1936, C.W. Wang 78573 (holotype: TAI!, isotypes: A!, IBSC!].

Distribution and habitat

Northern Thailand (Saunders and Chalermglin 2008), China (Li et al. 2011) and Northern Laos (Oudomxay Province), Montane forests; 1000–1500 m.

Specimens examined

Laos: Maung Xai, Phou Hin Phee National Biodiversity Conservation Area, Oudomxay province, 1357 m, 20°43'19.12"N, 102°08'46.61"E, 30 March 2018, Y.H. Tan et al., L0350 (HITBC); ibdem, 1372 m, 20°43'18.24"N, 102°08'47.31"E, 30 March 2018, Y.H. Tan et al., L0351 (HITBC).

Notes

Goniothalamus cheliensis is a very distinctive species, with leaves, flowers and fruits very large and densely rust-colored hirsute (Saunders and Chalermglin 2008), according to our personal observation, the monocarps of G. cheliensis can be up to 15 cm long.
With the addition of Goniothalamus saccopetaloides, Goniothalamus cheliensis, and Goniothalamus calvicarpus, seven species are currently recognized in Laos (Newman et al. 2007; Saunders and Chalermglin 2008; Li et al. 2011; Lee 2016). A key is provided below to further elucidate the morphological differences among the species occurring in Laos.

Key to the Goniothalamus species in Laos and along with G. yunnanensis

Key to the Goniothalamus species in Laos and along with G. yunnanensis — B. Yang , R. Zhu , H. Ding , S. Bouamanivong , Y. Tan

1		Young branches densely hairy to velutinous, leaf midrib and petiole (very densely) hairy abaxially    2
–		Young branches glabrous, leaf midrib and petiole glabrous to sparsely hairy abaxially    3
2		Leaf blade 50–76 × 13–22 cm, stamen connectives apiculate, monocarps oblong, 3–15 cm long and densely hairy     G. cheliensis
–		Leaf blade 12–17 × 3.7–4.7 cm, stamen connectives truncate, monocarps ovoid, less than 3 cm long and glabrous     G. tamirensis
3		Adaxial surface of leaves with very prominent secondary and tertiary veins    4
–		Adaxial surface of leaves with impressed or only slightly prominent secondary and tertiary veins    6
4		Stamen connectives apiculate, sepals 11–18.5 mm long     G. calvicarpus
–		Stamen connectives truncate, sepals 5–8 mm long    5
5		Flowers on older branches and young growth, outer petals not fleshy, never involute, monocarps ellipsoid, 1.8–2.5 cm long, apex acute     G. yunnanensis
–		Flowers on main trunk and older branches, outer petals almost fleshy, involute, monocarps subglobose to ellipsoid, 1.2–1.3 cm long, apex rounded     G. saccopetaloides
6		Ovules 8–10 per carpel, monocarps oblate, with its longitudinal ridge     G. laoticus
–		Ovules 1–2 per carpel, monocarps oblong-ellipsoid to ellipsoid, or elliptic-ovoid    7
7		Leaf blades with short to long acuminate apices, outer petal venation distinct, sparsely puberulous to glabrous abaxially     G. repevensis
–		Leaf blades with acute to attenuate apices, outer petal venation indistinct, hispidulous abaxially     G. gabriacianus

Taxon Treatment

• Yang, B; Zhu, R; Ding, H; Bouamanivong, S; Tan, Y; 2020: A new species and two new records of Goniothalamus (Annonaceae) from Lao PDR PhytoKeys, 138: 17-25. doi

Images

Figure 2. Goniothalamus calvicarpus Craib A leafy branch B leaves (abaxial) C fruit D flower (epibiotic sepels); Goniothalamus cheliensis Hu E leafy branch F leaves (abaxial) G flower H flower (picked petals, showing stamens and carpels) I dissected flowers. Photographed by H.B. Ding.