Micropera rostrata (Roxb.) N.P.Balakr.,J.

T., Jitpromma, T., Chanokkhun, Wai, Sae, A., Schuiteman, Watthana, S. & Lindl., Micropera, 2023, The genus Micropera (Orchidaceae: Aeridinae) in Thailand, Rheedea 33 (3), pp. 159-173 : 169-171

publication ID	https://doi.org/10.22244/rheedea.2023.33.03.02
persistent identifier	https://treatment.plazi.org/id/713187CA-FF93-FF86-FF58-8B2DB57F65C3
treatment provided by	Felipe
scientific name	Micropera rostrata (Roxb.) N.P.Balakr.,J.
status

Treatment

Micropera rostrata (Roxb.) N.P.Balakr.,J. View in CoL Bombay Nat. Hist. Soc. 67: 66. 1970; Seidenf., Nordic J. Bot. 2: 217. 1982; Christenson, Amer. Orchid Soc. Bull. 54, 8: 956. 1985. Aerides rostrata Roxb., Fl. Ind. View in CoL 3: 474. 1832 [as ‘rostratum’]. Camarotis rostrata (Roxb.) Rchb.f. in Walp., Ann. Bot. Syst. 6: 881. 1861; Prain, Bengal Pl. 2: 1204. 1903; Hunt., Bot. Mag. 177: 537. 1969. Type: BANGLADESH, Sylhet, icon. Aerides rostratum [sic], Roxburgh 2348 (syn CAL, K digital image!).

Micropera purpurea (Lindl.) Pradhan, Indian Orchids View in CoL 2: 619. 1979. Camarotis purpurea Lindl., Gen. Sp. Orchid. Pl. View in CoL 219. 1833; Sert. Orchid. 19. 1838; Paxt. Mag. Bot. 7: 25. 1840; J. Linn. Soc., Bot. 3: 37. 1859; Smith, Natuurk. Tijdschr. Ned.- Indië 72: 98. 1912; Schltr., Orchideen: 589. 1915; 580. 1927; Fischer, Rec. Bot. Surv. India 12, 2: 136. 1938; Seidenf. & Smitinand, Orchids Thailand: 715, f. 522. 1965; Rao & Deori, J. Ind. For. 3, 3-4: 258. 1980. Sarcochilus purpureus (Lindl.) Benth. ex Hook.f., Fl. Brit. View in CoL India 6: 37. 1890; Panigrahi & Naik, Bull. Bot. Surv. India 3, 3-4: 381. 1962. Lectotype (designated here): BANGLADESH, Sylhet, Purarooak, March 1828, Wallich 7329 (leg. W. Gomez 185) (K-LINDL [K000974248!], isolecto K-W [K001127183!]). FiGS. 2 View Fig f-G & 7

Stem 12–20 cm long, covered by glabrous leaf sheaths. Leaves about 10, distichous, c. 2 cm apart, flat, conduplicate, oblong-linear, 10–12 × 1.5–2 cm, apex unequally bilobed with rounded lobes, fleshy. Inflorescences pendent, 10–15 cm long, up to 30-flowered; peduncle 3–5 cm long, with 2–3 sheathing sterile bracts 0.3–0.4 cm long; rachis up to 30 cm long, unbranched; bracts broadly triangular, obtuse, 2–2.5 × c. 2 mm, fleshy. Flowers non resupinate, pale to bright purple-pink, lip base sometimes white with purple-pink margin, column white tinged with purple-pink; pedicel and ovary 9–12 cm long. Dorsal sepal elliptic-oblong, 8–10 × 4–4.5 mm, apex broadly rounded or obutse and usually recurved, 5-veined; lateral sepals obovate-oblong, falcate, 8.3–9.5 × 3.8–4.2 mm, apex broadly rounded, 5-veined. Petals elliptic-oblong or lanceolate-oblong, to 8.2–9 × 3.4–3.5 mm, slightly oblique, broadly rounded, 5-veined. Labellum fleshy, deeply boat-shaped, 8–8.5 mm long, 5.4–6.3 mm high, obscurely 3-lobed; lateral lobes inconspicuous, broadly triangular, 7–7.5 × 1–2 mm; mid-lobe triangular, 0.5–0.6 × 1–1.3 mm; spur 4.8–5.7 mm long, with longitudinal septum and triangular tongue callus at base of mid lobe. Column stout, 1.8–2 mm long; rostellum beak 6.5–7 mm long, sigmoid in lateral view, only slightly twisted sideways. Anther c. 3 × 1 mm long with long beak. Fruit not seen.

Flowering & fruiting: Flowering from May to July and in December; fruit not seen.

Habitat: Epiphyte in evergreen hill forests, at 1,300–1,600 m elevation.

Distribution: India, Bangladesh, and Thailand.

Specimens examined: BANGLADESH, Sylhet, 12.12.1997, Wallich 7329 (K-W digital image) ; INDIA, Assam, Jainteapur, Jaintea Hills , April 1899, Prain 111 ( M digital image) . THAILAND, Loei, Phu Krading , 1300 m, 07.1959, G . Seidenfaden & T . Smitinand 3730 ( C) . Mae Hong Son, Ban Rak Thai , c. 1600 m, 12.06.2020, A . Karnpungton s.n. ( QBG) . Tak, Mae Sot , 21.05.1988, W . Songkakul 17 ( BKF) .

Notes: This species is easily recognised by the very long and sigmoid rostellum. With its numerous, bright pinkish-purple flowers it is one of the more attractive species in this genus, which is generally of little horticultural importance.

Micropera thailandica Garay ex Seidenf., Opera Bot. View in CoL 95: 126. 1988; Vaddhanaphuti, Wild Orchid Thailand, ed. 4, 186, incl. colour photo, 2005; Schuiteman et al., Cambodian J. Nat. Hist. 2015 (2): 136, f. 6 & 7. 2015; Kurzweil & Lwin, Gard. Bull. Singapore 67(1): 117, f. 1B & 3C. 2015. M. thailandica (Seidenf. & Smitinand) Garay, Bot. Mus. Leafl. View in CoL 23: 187. 1972, nom. inval. Camarotis thailandica Seidenf. & Smitinand, Orchids View in CoL Thailand: 712, f. 529. 1965, nom. inval.; Cumberlege., Nat. Hist. Bull. Siam Soc. 20, 3: 155–174. 1963. Type: THAILAND, Satun, Feb 1961, Seidenfaden, G. & Smitinand, T. GT 4118 (holo C). FiGS. 2 View Fig h-i & 8

Stem up to 30 cm long, glabrous, covered by dark, rugose leaf-sheaths. Leaves distichous, c. 2 cm apart, flat, conduplicate, oblong-linear, 8–18 × 1–1.5 cm, apex unequally bilobed with subacute lobes, fleshy. Inflorescences more or less upright, 8–15 cm long, with up to 25 flowers; peduncle 7–10 cm long, with 2–3 sheathing peduncle scales 3–4 mm long; rachis 5–10 cm long, unbranched; bracts broadly triangular, obtuse, 1.5–2 × 2.5–3 mm. Flowers non resupinate, yellow or light orange-yellow, lip base sometimes white, sepals sometimes tipped with brown, column white or cream. Dorsal sepal elliptic-ovate, 7–7.5 × 2.5–3 mm, apex broadly rounded, concave, fleshy; lateral sepals ovate-oblong 6.5–7 × 3.5–4 mm, slightly oblique. Petals elliptic-lanceolate, 6.5–7 × 2–2.5 mm, obtuse. Labellum fleshy, deeply boat-shaped 6–6.5 mm long, 5.5–6 mm high, obscurely 3-lobed; lateral lobes inconspicuous, broadly triangular 5–5.5 × 1.2–1.5 mm, edges minutely serrate; mid-lobe triangular, 1.5–2 × 2–2.5 mm, with indistinct cone-shaped swelling; spur 5–6.5 mm long, with longitudinal septum and triangular tongue-shaped callus at base of mid lobe, emarginate. Column slender, 5–6 mm long, with 2 short appendages below stigma; rostellum beak 1.5–2 mm long, not twisted. Anther 1.8–2 × 1.5–1.6 mm, with short beak. Fruit not seen.

Flowering & fruiting: Flowering in April–May; fruit not seen.

Habitat: Epiphyte in evergreen forests.

Distribution: Myanmar, Thailand, Cambodia, and Vietnam.

Specimens examined: THAILAND, Bangkok, Jatujak Market , 18.04.2012, J . Phelps 7680 ( BKF) . Loei, Phu Pha Mok , 06.04.2003, D. J . Middleton et al. 1935 ( BKF) . Nakhon Nayok, Haew Suwat, Khao Yai , 23.04.1964, G . Seidenfaden & T . Smitinand 5773 ( C) . Nakhon Ratchasima, Khao Yai , 700 m, G . Seidenfaden & T . Smitinand 4403 ( C), Khao Yai National Park, Pha Khuai Mai Nature Trail , 747 m, 08.04.2019, S . Kaitongsuk 211 ( BKF) . Narathiwat, Weang , P . Puudjaa 321 ( BKF) . Phathalung, Khao Den , c. 200 m, 19.04.1928., A . F .G. Kerr 0574 ( K); Khao Soidao, c. 600 m, 29.04.1930, A . F .G. Kerr 0835 ( K) . Ranong, NW of Phato , 200-300 m, 02.05.1974, K . Larsen & S . S . Larsen 33557 ( AAU!) . Rayong, s. loc., 11.04.2004, P . Puudjaa 1322 ( BKF) . Satun, Khao Keo Range , 700 m, 31.03.1963, A . F .G. Kerr 0528 ( AAU); Thungnui, 05.02.1961, G . Seidenfaden & T . Smitinand 4118 ( C) .

Notes: This species is similar to M. fuscolutea (Lindl.) Garay but differs in lacking a distinct, raised callus on the labellum mid-lobe.

Figures

Abbreviations

M	Botanische Staatssammlung München
G	Conservatoire et Jardin botaniques de la Ville de Genève
T	Tavera, Department of Geology and Geophysics
C	University of Copenhagen
A	Harvard University - Arnold Arboretum
QBG	Queen Sirikit Botanic Garden
W	Naturhistorisches Museum Wien
BKF	National Park, Wildlife and Plant Conservation Department
J	University of the Witwatersrand
S	Department of Botany, Swedish Museum of Natural History
P	Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants
F	Field Museum of Natural History, Botany Department
K	Royal Botanic Gardens
AAU	Addis Ababa University, Department of Biology

Copyright notice

No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.

Taxonomy

Kingdom	Plantae
Phylum	Tracheophyta
Class	Liliopsida
Order	Asparagales
Family	Orchidaceae
Genus	Micropera