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Ботанический журнал, 2021, T. 106, № 10, стр. 1036-1040

IMPATIENS MONTICOLA (BALSAMINACEAE), A NEWLY RECORDED SPECIES FOR THE FLORA OF VIETNAM

Cuong Huu Nguyen 1, 2, *, L. V. Averyanov 3, **, A. A. Egorov 4, ***, Ly Van Nguyen 2, ****

1 St.-Petersburg State Forest Technical University
194021 St.-Petersburg, Institute Str., 5, Russia

2 Vietnam National University of Forestry
Hanoi, Vietnam

3 Komarov Botanical Institute RAS
197376 St.-Petersburg, Prof. Popov Str., 2, Russia

4 St.-Petersburg State University
199034 St.-Petersburg, Universitetskaya Emb., 7/9, Russia

* E-mail: nguyenhuucuong.tvr@gmail.com
** E-mail: av_leonid@mail.ru
*** E-mail: a.a.egorov@spbu.ru
**** E-mail: lynguyenvnuf@gmail.com

Поступила в редакцию 22.10.2020
После доработки 24.07.2021
Принята к публикации 27.07.2021

Полный текст (PDF)

Аннотация

Impatiens monticola Hook.f., previously known from China and India only, is found at first in Vietnam: Ta Xua Nature Reserve, Son La Province. The voucher herbarium specimens of this species collected in Vietnam are housed in the Herbarium of Vietnam National University of Forestry (VNF) and the Komarov Botanical Institute (LE). Amended morphological description of this species accompanied with color photos, new data on ecology and phenology are additionally provided.

Keywords: Balsaminaceae, Impatiens, I. monticola, new record, Vietnam

Impatiens L. (Balsaminaceae) includes about 900 species (Chen et al., 2007a) distributed in the northern hemisphere with the highest diversity in the tropical zone of Africa and Asia (Song et al., 2003; Yuan et al., 2004). Forty one species have been recorded in Vietnam up to now (Hooker, 1909a, b; 1911; Tardieu, 1944; Pham, 2003; Nguyen, 2003; Chen et al., 2007b; Shui et al., 2011; Vu et al., 2015; Hoang et al., 2015; Hoang et al., 2016; Nguyen et al., 2018; Pham et al., 2019).

During our field survey of plant diversity in the Ta Xua Nature Reserve (Son La Province, northern Vietnam) in 2020, we collected unusual specimens of Impatiens. After examination of available collections in herbaria (HN, HNU, NHNP, LE, VNM), as well as analysis of relevant regional literature, we identified this plant as Impatiens monticola Hook. f., which was previously reported only from China (Chen et al., 2007a) and India (Panday et al., 2014). This is the first record of this species in the flora of Vietnam, data for which are presented below.

Impatiens monticola Hook.f., 1908, Nouv. Arch. Mus. Hist. Nat., ser. 4, 10: 257; Chen et al., 2007, in Z.-Y. Wu, P.H. Raven et D.Y. Hong (eds.), Fl. China 12: 92; Panday, Sinha et Karmakar, 2014, NeBIO 5, 6: 31.

Described from central China, Sichuan (“Szechuan; monte Omei, alt. 4000 ped. Père E. Faber (ex Herb. Aug. Henry, n. 863), E.-H. Wilson n. 4735, in Herb. Paris et Kew”). Syntypes: Ernst Faber 863 (K000199718 – photo! http://apps.kew.org/herbcat/ detailsQuery.do?barcode=K000199719), E.-H. Wilson 4735 (K000199719 – photo! http://apps.kew.org/ herbcat/detailsQuery.do?barcode=K000199718), E.-H. Wilson 4735 (P-P00492344 – photo! https://plants.jstor. org/stable/10.5555/al.ap.specimen).

Description (Fig. 1). Herb, terrestrial, perennial, to 0.6 m tall, glabrous (except leaves). Stem slender, erect, usually solitary, sometime branched from the base. Leaves alternate, crowded on upper part of stem, petiolate, with stipular glands; petiole to 5 cm long, shorter in upper leaves; leaf blade pale gray-green abaxially, green adaxially, ovate-elliptic or obovate, 11–16 × 4.5–6 cm, base cuneate, attenuate into petiole, margin crenulate, apex acuminate or shortly caudate, strigose between teeth with hairs to 1 mm long; venation distinctly reticulate, prominent on both surfaces, lateral veins 5–7 pairs. Inflorescences axillary, racemose, located near stem apex, each with 2 flowers; peduncles longer than petioles, 5.5–6 cm long, elongate at fruiting. Flowers pale yellowish with reddish streaks, about 3.5 cm in diameter; pedicels 1.5–2 cm long, glabrous, green; bracts persistent, green, lanceolate or narrowly ovate, 4–6 mm long, herbaceous; lateral sepals 2, ovate to broadly elliptic, 11–13 × 6–8 mm, pale green with reddish spots at the base, membranous, inconspicuous, with 5–7 veins, apex acuminate, the base broadly cuneate to almost rounded. Lower sepal 4–5 cm long, broadly funnel-shaped, bright yellow with reddish streaks inside, constricted into a spur; mouth 2.0–2.2 cm wide, with conspicuous beak, to 2–3 mm long, curved; spur 2.5–3 cm long, twisted, yellow green to yellow with reddish spots. Dorsal petal 2–2.2 × 1.4–1.6 cm, ovate, apex cuspidate, median vein distinct, with obtuse crest, base obtuse. Lateral united petals not clawed, 2.6–2.8 cm long, 2–lobed; upper petals 1.6–1.8 × 1–1.2 cm, sub-orbicular, apex short acute or obtuse, pale yellowish; lower petals 1.4–1.6 × 1.6–1.8 cm, obdeltoid, pale yellowish, apex rounded or truncate. Stamens 5, filaments fibrous, 4–5 mm long; anthers ovoid, apex obtuse. Capsule erect, narrowly fusiform, 2–2.5 cm long. Seeds many, brownish-yellow, ellipsoid, 3 mm long.

Fig. 1.

Impatiens monticola Hook. f. (a) – habitat; (b) – flowering plant in natural habitat; (c) – flower (frontal view); (d), (e) – flower (side view); (f) – flower (dorsal view); (g) – bract; (h) – lateral sepal; (i) – lower sepal; (j) – dorsal petal; (k) – lateral united petals; (l) – stamens; (m) – fruit. All photos by Ly Van Nguyen, design by Cuong Huu Nguyen.

Flowering and fruiting: September – November.

Distribution. Vietnam (Son La Province, Ta Xua Nature Reserve), China (Chongqing, Sichuan), India (Mizoram, Lawngtlai District, Phawngpui National Park).

Habitat and ecology in Vietnam. Primary and secondary evergreen broad-leaved mountain forests, usually along watershed at elevations 1200–1300 m a.s.l. in association with Begonia longifolia, Dichroa hirsuta, Leea bracteata, Dendrocnide stimulans, Costus tonkinensis, Diplazium esculentum, Selaginella argentea, Angiopteris evecta, and Oplismenus compositus.

Specimens examined (Fig. 2): Vietnam, Son La Province, Ta Xua Nature Reserve, elev. 1254 m, 21°20'40.0"N 104°35'28.4"E, 03 Oct. 2020, N. V. Ly 20201003004 "(VNF; LE01077047 http://en.herbariumle.ru/?t=occ&id=91551, LE01087903 http://en.herbariumle.ru/?t=occ&id=46178, LE01087904 http://en.herbariumle.ru/?t=occ&id=46182, LE01087905 http://en.herbariumle.ru/?t=occ&id=46179, LE01087906 http://en.herbariumle.ru/?t=occ&id=46180).

Fig. 2.

Impatiens monticola Hook. f. Herbarium voucher specimen N.V. Ly, NVL 20201003004 housed at VNF.

Notes: Impatiens monticola is very similar morphologically to I. mengtszeana Hook.f., which was also reported previously as an endemic to China. Comparison of distinguishing characters of I. monticola and I. mengtszeana, which may be found in Vietnam as well are presented in the Table 1.

Table 1.

Comparison of morphological characters of Impatiens monticola and I. mengtszeana

Character I. monticola I. mengtszeana
Stem length to 60 cm 20–40 cm
Petiole length to 5 cm 2.5–3 cm
Number of lateral veins on leaf blade 5–7 pairs 6–8 pairs
Pedicel length 1.5–2 cm 0.5–2.5 cm
Flower color pale yellowish with reddish streaks yellow
Bract character persistent caducous
Number of veins in lateral sepal 6–8 veins 3–5 veins
Lower sepal shape and length broadly funnel-shaped, spur 3–3.5 cm long funnel-shaped or subsaccate, spur ca. 2.5 cm long
Dorsal petal size 2.0–2.2 × 1.4–1.6 cm 1.5–1.8 × 2 cm
Lateral united petals shape and length not clawed, 2.6–2.8 cm long clawed, 3–4 cm long
Upper petal shape and size suborbicular, 16–18 × 10–12 mm orbicular to broadly triangular-obovate, 1.2 × 1.2 cm
Lower petal shape and size obdeltoid, 14–16 × 16–18 mm broadly dolabriform to suborbicular, 1.8 × 1.4 cm
Filament length 4–5 mm 6–7 mm
Ovary shape straight, terete curved, fusiform
Capsule shape erect, narrowly fusiform narrowly ovoid

Список литературы

  1. Chen Y., Akiyama S., Ohba H. 2007a. Impatiens L. – In: Flora of China. Vol. 12. Science Press, Beijing, and Missouri Botanical Garden Press. P. 43–113.

  2. Chen Y.L., Akiyama S., Ohba H. 2007b. Balsaminaceae. – Flora of China.Vol. 12. Science Press, Beijing, and Missouri Botanical Garden Press. P. 43–114.

  3. Hoang T.S., Trinh N.B., Nguyen Q.H., Pham V.V., Nguyen T.V.A. 2015. Impatiens parvisepala (Balsaminaceae): a newly recorded from Vietnam. – Vietnam J. Forest Sci. 4: 4018–4020.

  4. Hoang T.S., Trinh N.B., Nguyen Q.H., Pham V.V., Cao V.L. 2016. Impatiens morsei (Balsaminaceae): a newly recorded from Vietnam. – Sci. Res. Rep. 6: 1–3.

  5. Hooker J.D. 1909a. Impatiens d’Indo-Chine. – In: Notulae systematicae, Laboratoire de Phanérogamie. Vol. 1. Muséum National d’Histoire Naturelle. P. 10–14.

  6. Hooker J.D. 1909b. On some species of Impatiens from Indo-China and the Malayan peninsula. – In: Bulletin of Miscellaneous Information. Vol. 1. Royal Gardens. P. 1–12.

  7. Hooker J.D. 1911. Balsaminacees. – In: Flore Generale de l’Indo-Chine. Vol. 1. P. 611–629.

  8. Nguyen S.K., Tong Y.H., Xia N.H. 2018. Impatiens napoensis (Balsaminaceae): a newly recorded species for the flora of Vietnam. – Journal of Tropical and Subtropical Botany. 26: 545–548.

  9. Nguyen T.B. 2003. Balsaminaceae – In: Checklist of Plant Species of Vietnam. Vol. 2. Hanoi. P. 1047–1051 (in Vietn.).

  10. Panday S., Sinha B.K., Karmakar P. 2014. Impatiens monticola (Balsaminaceae): a new distributional record for India. – NeBIO. 5 (6): 31–33.

  11. Pham H.H. 2003. An illustrated Flora of Vietnam. Vol. 2. Ho Chi Minh, Vietnam. P. 298–306.

  12. Pham T.T., Do V.T., Nguyen T.T., Phung T.T., Pham V.T. 2019. Impatiens siculifer (Balsaminaceae): a New Record for the Flora of Vietnam. – Acta Phytotaxonomica et Geobotanica. 70: 63–66.

  13. Shui Y.M., Janssens S., Huang S.H., Chen W.H., Yang Z.G. 2011. Three new species of Impatiens L. from China and Vietnam: preparation of flowers and morphology of pollen and seeds. – Syst. Bot. 36 (2): 428–439. https://doi.org/10.1600/036364411X569615

  14. Song Y., Yuan Y.M., Kupfer P. 2003. Chromosomal evolution in Balsaminaceae, with cytological observations on 45 species from Southeast Asia. – Caryologia 56: 463–481. https://doi.org/10.1080/00087114.2003.10589359

  15. Tardieu B.M. 1944. Les Impatiens d’Indochine, repartition, affinities et description d’especes nouvelles. – Notulae Systematicae. 11: 169–185.

  16. Vu T.C., Nguyen T.T.H., Bui H.Q., Suksathan P. 2015. A new record of Impatiens kamtilongensis Toppin (Balsaminaceae) for Vietnam flora. – J. Biol. (Tap Chi Sinh Hoc). 37 (3): 332–335.

  17. Yuan Y.M., Song Y., Geuten K., Rahelivololona E., Wohlhauser S., Fischer E., Smets E., Küpfer P. 2004. Phylogeny and biogeography of Balsaminaceae inferred from ITS sequence data. – Taxon. 53: 391–403. https://doi.org/10.2307/4135617

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