Aristolochia vallisicola
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Genus: Aristolochia
Name
Aristolochia vallisicola T.L.Yao sp. nov. – Wikispecies link – IPNI link – Pensoft Profile
Note
This species differs from all other Peninsular Malaysian Aristolochia L. species in its lamina with pinnate lateral veins, inflorescence with a long peduncle, its disc-shaped perianth limb, annulated hairy perianth mouth and 3-lobed gynostemium. This species is similar to Aristolochia coadunata Backer in the lanceolate or oblanceolate lamina with pinnate lateral veins but differs in its larger disc-shaped perianth limb, 58–65 mm diam. versus 15–30 mm diam. in Aristolochia coadunata and its longer peduncle, 15.5–17 cm long versus up to 2 cm long in Aristolochia coadunata. This species is also similar to Aristolochia versicolor S.M.Huang in the lanceolate or oblanceolate lamina with pinnate lateral veins but differs in its longer petiole, 2.5–7 cm long versus 1–2 cm long, broader leaves, at least 7.5 cm wide versus to 6.5 cm wide, and longer peduncle, 15.5–17 cm long versus 2–3(–10) cm long in Aristolochia versicolor. The summary and other characters comparison is presented in Table 1.
Type. Peninsular Malaysia. Pahang: Genting Highlands, Awana Waterfall. 26 November 1999 (fl), R.Kiew 4879 (holotype SING!, barcode 78162).
| Characters | Aristolochia vallisicola | *Aristolochia coadunata | **Aristolochia versicolor (China) | ***Aristolochia versicolor (Thailand) |
|---|---|---|---|---|
| Petiole length; indumentum | 2.5–7 cm long; puberulous | 3–9 cm long; pubescent | 1–2 cm long; sparsely pilose | 1–2 cm long; adpressed hairy |
| Lamina; length by width (cm) | lanceolate, oblanceolate or broadly oblanceolate; 15–24 × 7.5–14 | ovate oblong to lanceolate, rarely ovate; 7.5–33 × 4–12 | narrowly elliptic to lanceolate-elliptic; 14–25 × 4–6.5 | oblanceolate, oblong-oblanceolate, or elliptic oblong; 11.2–17.5 × 3.4–4.7 |
| Lamina base; sinus depth (mm) | cordate; 2–3 | cordate; 5–10 | narrowly auriculate; 5–7 | narrowly, slightly cordate |
| Pinnate lateral vein pairs | 6–7 | 4–6 | 9–10 | 7–8 |
| Inflorescence | cauline; peduncle 15.5–17 cm long, divided into 4–5 internodes of different lengths | in axils of foliage leaves, rarely cauline; peduncle up to 2 cm long | in axils of foliage leaves, peduncle 2–3 cm long | in axils of foliage leaves, peduncle ca 10 cm long |
| Bract indumentum | pilose | puberulous | — | pilose |
| Perianth | tube geniculately curved, utricle cylindric, ca 30 × 8 mm, tube ca 35 × 8 mm; limb disc-shaped, 58–65 mm diam., 3-lobed, mouth annulate | tube geniculately curved, utricle ovoid tubular, 35–30 × 7 mm, tube cylindric, 30–45 × 6 mm, limb disc-shaped, 15–30 mm diam., obscurely 3-lobed, mouth not annulate | tube geniculately curved, basal portion of tube 30–40 × 6–8 mm; limb disc-shaped, 40–60 mm diam., 3-lobed, mouth annulate | tube geniculately curved, utricle ovoid, 8–10 × 8–12 mm, tube ca 13–23 × 5–7 mm; limb disc-shaped, 46–50 mm diam. |
| Distribution | Peninsular Malaysia | Sumatra, Java, †Peninsular Malaysia (Hou 1984[1]; Igarashi and Fukuda 1999[2]) | China: Guangdong, Guangxi, Yunnan (Huang et al. 2003[3]) | North Eastern Thailand (Phuphathanaphong 1987[4]) |
Description
Slender climber. Stem ca 2.5 mm thick, surface shallowly furrowed, sometimes smooth, puberulent, trichomes hooked. Leaves: petiole twisted, 2.5–7 cm long, ca 2.5 mm thick, puberulent, indumentum a mix of hooked and straight hairs; lamina lanceolate or narrowly oblanceolate or oblanceolate, 15–24 × 7.5–14 cm; base cordate, auricles rounded, sinus 2–3 mm deep, 8–12 mm wide, margin entire, apex acute; leathery; lamina surface above glabrescent, with scattered black gland dots, lamina surface below puberulent, indumentum a mix of longer straight and shorter hooked hairs; midrib above sunken, below prominent; lateral veins pinnate, above faint, below prominent, basal pair 1, pinnate pairs 5–7; intercostal veins net-like. Inflorescences cauline, solitary; peduncle branched once; 15.5–17 cm long, ca 2 mm thick, puberulent, indumentum mainly of hooked trichomes, scattered with long spreading hairs. Bracts ovate, ca 3 × 1.5 mm, pubescence, base cuneate, apex acute. Flowers: pedicel ca 40 mm long, ovary ca 13 × 2 mm, villous; perianth glossy, greyish pale orange with purple tinge, purple beneath, ca 6.5 cm long, outer surface sparsely villose with shorter hooked trichomes, tube geniculately curved, utricle cylindric, ca 30 × 8 mm, inner surface with a glistening white patch of stellate trichomes, perianth tube ca 35 × 8 mm, limb disc-shaped, 5.8–6.5 cm diam., 3-lobed, venation faint, mouth annulate, villous; gynostemium in transverse section faintly trigonal; stamens 6, anthers ca 3 × 0.3 mm; stigmatic lobes 3, conical, ca 0.8 mm long, apex blunt. Fruit and seed unknown.
Vernacular name
Akar telinga berok (Malay).
Distribution
Aristolochia vallisicola isendemic in Peninsular Malaysia, Pahang. It has only been found on Titiwangsa Range and its vicinities.
Ecology
Thisspecies occurs in highland valleys of lower montane forest about 1000 m altitude and often by rocky streamsides. Specimens with flowers werecollected in September and November.
Etymology
The species name vallisicola denotes its habitat preference for valleys.
Conservation status
Least Concern. This species occurs above 1000 m altitude, a habitat which is protected by Malaysian legislation.
Specimens examined
Peninsular Malaysia, Pahang: Ulu Kelau, Raub, 24 September 1929 (fl), Kalong FMS 20248 (KEP, barcode 196080); Genting Tea Estate, R. Kiew s.n. (KEP, barcode 196081).
Original Description
- Yao, T; 2012: Aristolochia vallisicola (Aristolochiaceae), a new species from Peninsular Malaysia PhytoKeys, 14: 15-22. doi
Other References
- ↑ Hou D (1984) Aristolochiaceae. Flora Malesiana, Ser.I, 10: 53-108.
- ↑ Igarashi S, Fukuda H (1999) The Life Histories of Asian Butterflies 1. Tokai University Press. 1–549.
- ↑ Huang S, Kelly L, Gilbert M (2003) Aristolochiaceae. Flora of China 5: 246-269.
- ↑ Phuphathanaphong L (1987) Aristolochiaceae. Flora of Thailand 5: 1-31.
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