Lagarosiphon cordofanum Casp.

Species

Angiosperms > Alismatales > Hydrocharitaceae > Lagarosiphon

Characteristics

Stems filiform or terete, 0.2–2 mm. in diameter, whitish to mid-green.. Leaves spirally arranged to subopposite or in whorls, linear to narrowly linear-lanceolate, shortly to narrowly acute, light to dark green, patent, spreading or somewhat recurved, flaccid, translucent, 4–29 mm. long, 0.25–1(–1.8) mm. wide, with 2 broad bands of sclerenchyma fibres along either side of midrib; submarginal fibres absent; margins green, denticulate, the teeth usually curved towards the leaf-apex and with a triangular green base.. Nodal scales ovate to broadly ovate, the margins entire.. Male spathe ovate to broadly ovate, 1.3–2.7 mm. long, 1–2 mm. wide, pinkish white, containing 7–14 flowers.. Male flowers: sepals and petals elliptic, ± 1 mm. long, 0.3–0.5 mm. wide, white, translucent; stamens ± 2 mm. long.. Female spathe narrowly ovate to ovate, 1.7–2.8 mm. long, 0.7–1.2 mm. wide.. Female flower: sepals and petals elliptic to obovate, 0.7–1.2 mm. long, 0.5–0.8 mm. wide, white, translucent; ovary ± 2 mm. long, with 10–40 ovules; perianth-tube up to 50 mm. long; stigmas 1.3–1.7 mm. long, purplish.. Fruit ovoid, 2.5–4 mm. long, 1.5–2 mm. wide.. Seeds narrowly ellipsoid, 1–1.5 mm. long, 0.3–0.5 mm. wide, brown.. Fig. 1.
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Stems filiform, 1-2 mm in diameter. Leaves alternate, subopposite to verticillate above, usually densely spaced on the stems, spreading, soft, thin, transparent, linear, average size 14 mm long and 0.5 mm broad, marginal cells chlorophyllous, the many sharp curved teeth pointing upwards, situated on small triangular excrescences; leaf-tips bi-dentate; central area beside the midrib narrow to very broad, consisting of large lacunar cells without or with very little chlorophyll, usually with distinct transverse veins. Male inflorescence with spathe-valves cup-shaped, obovoid, 2 mm long, acute at first, becoming broad and gaping during anthesis, with about 8 teeth on each side. Female inflorescence with spathes forming a narrow ovoid tube 2.5 mm long, entire or with some small teeth; perianth white, limb 2 mm in diameter; ovary with 24-30 ovules, funicles about as long as the ovules; stigmas with short papillae. Capsule ovoid, acuminate, 3 mm long, many-seeded; seeds 1 mm long, turbinate, with raised ridges which have transverse septa (when dry).
Aquatic herb, submerged. Leaves alternate, opposite or occasionally verticillate, central area broad, usually with transverse septa. Leaf teeth on excrescences. Female flowers white.
Life form perennial
Growth form herb
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Sexuality dioecy
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Hardiness (USDA) 9-12

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Cultivation

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Distribution

Lagarosiphon cordofanum world distribution map, present in Angola, Botswana, Ethiopia, Kenya, Mozambique, Namibia, Rwanda, Sudan, Somalia, Tanzania, United Republic of, Uganda, South Africa, Zambia, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:431815-1
WFO ID wfo-0000769414
COL ID 6NT8T
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Lagarosiphon cordofanum Lagarosiphon crispus Udora cordofana Lagarosiphon tenuis Lagarosiphon tsotsorogensis Lagarosiphon fischeri Lagarosiphon nyassae