Proboscidea sabulosa
| Proboscidea sabulosa | ||||||||||||
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| Scientific name | ||||||||||||
| Proboscidea sabulosa | ||||||||||||
| Correll |
Proboscidea sabulosa is a species of the genus Proboscidea from the chamois horn family( Martyniaceae ). She comes from the New World .
description
Habitus
Proboscidea sabulosa lives as a summer annual and arises from a strong taproot . The stem grows lying on top.
Vegetative characteristics
The leaves grow opposite to half-opposite, the stem is up to 15 cm long. The leaf blade is ovate to broad, semi-kidney-shaped, the tip of the leaf is rounded, the base of the leaf is heart-shaped and even to uneven and the leaf edge is smooth to wavy.
Generative characteristics
The inflorescence bears few flowers and is surmounted by foliage, the stem becomes 5 cm long. The flower stems are about 1 cm long during flowering and up to 2 cm when the fruit is ripe. The bracts are triangular, the sepals are 7-13 mm long, the sepals are 90% of their length free-standing. The corolla is 27 mm long and is cream-colored on the inside with spots that are purple near the body and red-purple at the opposite end. There are also orange-yellow sap marks on the inside of the corolla . The flowering period lasts from August to September .
The fruit capsules are browned to gray, pressed in on the sides, the capsule is up to 8 cm long and has a crest along its axis. The rostrum becomes 17 cm long. The seeds are silvery-gray, about 14-17 mm long, 4-6 mm wide, oblong and bevelled towards the end. 8–31 seeds are formed per capsule.
distribution
Proboscidea sabulosa is a site-dependent endemic and only grows on deep sand dunes on the southwestern edge of the Great Plains in Texas and in southeastern New Mexico . Another occurrence is found in the Pleistocene lakeshore remnants of Lake Coronado in western Texas and northern Mexico . A third location is near the northern sand hills of the Rio Grande and the surrounding area in central New Mexico.
Systematics
Proboscidea sabulosa was first described in 1966 by the American botanist Donovan Stewart Correll . The species forms the smallest flowers within the genus Proboscidea .
literature
- Raul Gutierrez: A Phylogenetic Study of the Plant Family Martyniaceae (Order Lamiales). Dissertation, Arizona State Univ., December 2011, online (PDF; 41.7 MB), at ASU Digital Repository.
- Jackie M. Poole, William R. Carr, Dana M. Price: Rare Plants of Texas: A Field Guide (= WL Moody, Jr., natural history series , Volume 37). Texas University Press, College Station 2007, ISBN 978-1-5854-4557-8 .