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Asclepias brachystephana Engelm. ex Torr.식물/들꽃-협죽도과(Apocynaceae) 2024. 10. 9. 14:13
국표에 없다.
Asclepias brachystephana is a PERENNIAL growing to 0.3 m (1ft). The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, insects, Lepidoptera (Moths & Butterflies).
Suitable for: light (sandy) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers dry or moist soil and can tolerate drought.Asclepias brachystephana Bract milkweed PFAF Plant Database
Plant: Perennial herb, 20-50 cm tall; STEMS ascending, much branched below, finely short woolly, especially on younger growth; with milky sap Leaves: opposite, the petioles 2-8 mm long, the blades narrowly lanceolate to linear-lanceolate, 3-13 cm long, 5-20 mm broad, long attenuate to an acute apex, obtuse to acute at the base, rather persistently white woolly above, glabrate below INFLORESCENCE: UMBELS lateral from many of the upper nodes, 2-4 cm broad, the peduncles 0.5-1.5 cm long, woolly, the pedicels white wooly Flowers: small; calyx lobes 2-3 mm long; corolla purple, the lobes 5-6 mm long; hoods drying yellow brown, erect-ascending, hemispheric, widening upward to a truncate to 3-lobed rim, the triangular marginal lobes slightly higher than the rounded median lobe, 1.5-2.6 mm long, 1.4-2 mm broad, ca. 1-2 mm shorter than the gynostegium, the horns attached near the middle of the hoods, tangentially flat, tongue-shaped, erect, short-exserted to about the height of the marginal lobes; anther wings 1.6-1.8 mm long; corpusculum 0.2-0.3 mm long, the pollinia 1-1.1 mm long Fruit: follicles erect on deflexed pedicels, 4-7 cm long, more or less conspicuously purple-striped Misc: Desert mts. and plains, grasslands, roadsides; 1300-2000 m (4200-6500 ft); May-Sep REFERENCES: Sundell, Eric. 1994. Asclepiadaceae. J. Ariz. - Nev. Acad. Sci. Volume 27, 169-187.
https://youtu.be/W4pzUvYVXdg?t=764
SEINet Portal Network - Asclepias brachystephana (swbiodiversity.org)
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