Sobralia macrantha Lindl.

국표에 없다.

Sobralia macrantha, commonly known as the large-flowered sobralia, is a species of orchid found from north-central and southern Mexico to Central America.

Found in Guerrero, Oaxaca, Puebla, Veracruz and Chiapas states of Mexico, Belize, Guatemala, El Salvador, Honduras, Nicaragua and Costa Rica at elevations of 90 to 3400 meters on leaf deitrius over rocks, sandy soils or streamside as a large sized terrestrial and rarely epiphytic, warm to cold growing species with terete, clustered stems that are leafy throughout and carrying narrowly to broadly lanceolate, plicate, long acuminate spreading, rigid leaves that blooms on a short, terminal, single flowered inflorescence subtended by a large foliaceous bract and occurs from the spring till autumn with fragrant, short-lived flowers.

Distinguished from other Mexican Sobralia by the erect, cane-like unbranched stems, glabrous leaves and very large 4.4 to 8.2" [11 to 21 cm] wide pink to purple flower.

IOSPE PHOTOS (orchidspecies.com)

Sobralia macrantha is one of the few "immortal" orchids in the glass flower collection [The Ware Collection of Blaschka Glass Models of Plants] at the Harvard Museum of Natural History [Peabody Museum], in Cambridge, Massachusetts. The photo at left shows a life-size flower and leaf, crafted in glass in 1888 by Leopold Blaschka and his son, Rudolph, artisans from Dresden.

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In 1982, D.H. Benzing, D.W. Ott, and W.E. Friedman published a study:
"Roots of Sobralia macrantha (Orchidaceae): structure and function of the velamen-exodermis complex," in: American Journal of Botany 69: 608-614.

Abstract: "Roots of Sobralia macrantha, a largely terrestrial orchid, bear a typical multilayered velamen underlaid by a cortical exodermis. The latter consists of densely cytoplasmic passage cells regularly interspersed among much larger, elongate, vacuolate cells. A structure which may be peculiar to Sobralia, or at least unusually well developed there -- the fibrous body -- consists of numerous intermeshed and divided wall outgrowths arising from two or three velamen cells positioned directly over the passage cell. This body is well designed to retard root transpiration. Should the fibrillar components be appropriately hygroscopic, it may act as a valve, promoting movements of water into the cortex while the velamen is engorged. The general mode of moisture and mineral procurement proposed for the Sobralia macrantha root probably applies to many other soil-and canopy-dwelling orchids with a velamen-exodermis complex."

Sobralia macrantha Lindley 1839 (autrevie.com)

Sobralia macrantha var. macrantha | Plants of the World Online | Kew Science

https://youtu.be/8avEAACqeDQ?t=2289