Aerva lanata (L.) Juss. ex Schult.
  • Syst. Veg.


This is a synonym of Aerva lanata (L.) Juss.
Notes: More details could be found in The Plant List v.1.1. Originally in The Plant List v.1.0

Morphology

Flowers white

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    Straggling herb, to 3 ft. high

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    Leaves alternate, orbicular (not seen in the Flora Zambesiaca area) to lanceolate, spathulate or elliptic-ovate, shortly or more longly cuneate at the base with petioles from c. 2 cm. to obsolete, rounded and apiculate to acute at the apex, commonly densely lanate or canescent on the inferior surface and more thinly so above, rarely glabrous or (not seen in Flora Zambesiaca area) thickly lanuginose, those of the main stems c. 10–50 × 5–35 mm., those of the branches and inflorescence reducing and frequently becoming very small.

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    Stem and branches terete, striate, more or less densely lanate with whitish or yellowish, more or less shaggy hairs, more rarely tomentose or canescent.

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    Perennial herb, sometimes flowering in the first year, frequently more or less woody and suffrutescent below, erect to prostrate, decumbent or occasionally somewhat scandent, stiff or weak and straggling, (0.1) 0.3–2 m., with numerous stems from the base and these frequently also branched above.

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    Tepals more or less densely lanate dorsally.

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    Hermaphrodite flowers: outer 2 tepals hyaline, elliptic-oblong, more or less abruptly contracted at the apex to a distinct mucro formed by the excurrent nerve, 1–1.75(2) mm. long; inner 3 slightly shorter and narrower, acute with a broad central green vitta which extends for about three quarters the length of each tepal and is usually furnished with a thickened border; style short; stigmas short, patent or divergent; anthers perfect.

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    Spikes sessile, solitary or usually in axillary clusters on the main stems or long to very short axillary branches, 0.4–1.5(2) × 0.3–0.4 cm., divergent, more or less cylindrical, silky, white to creamy, forming a long inflorescence which is leafy to the extreme apex and forms no terminal panicle even on the main stems; bracts (0.75) 1–1.25 mm., deltoid-ovate to oblong-ovate, hyaline with a short but distinct arista formed by the excurrent midrib, pilose, persistent; bracteoles similar or slightly smaller, also persistent.

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    Flowers female, male or hermaphrodite.

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    Capsule c. 1 mm. long, circular, compressed; seed c. 0.6–0.8 mm. long, reniform, black, shining, the testa almost smooth in the centre, faintly reticulate around the margin.

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    Male flowers similar but the stigmas reduced and capitate or obsolete, scarcely papillose.

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    Female flowers also similar, or commonly with the tepals longer and narrower, tapering above, the outer to c. 2.25 mm. long; stigmas longer and frequently equalling the style, linear, divergent or suberect; filaments reduced, anthers absent.

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    Perennial herb, sometimes flowering in the first year, frequently woody and suffrutescent below, prostrate to decumbent or erect (occasionally scandent), stiff or weak and straggling, (0.1–)0.3–2 m., branched from the base and often also above (upper branches short to long and slender even on the same plant), but stem and main basal branches often not further branched.

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    Flowers ♀ or hermaphrodite (probably also sometimes functionally ♂).

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    Hermaphrodite flowers: outer 2 tepals hyaline, oval-oblong, ± abruptly contracted at the tip to a distinct mucro formed by the excurrent nerve, 0.75–1.75 mm. without the mucro; inner 3 slightly shorter and narrower, acute with a broad central green vitta along the midrib, which extends for about three-quarters of the length of each tepal and is often ± furnished with a thickened border; style short, stigmas very short and patent or divergent; anthers perfect; probable male flowers similar but stigmas reduced, subcapitate or very short, scarcely papillose.

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    Female flowers: tepals sometimes similar to those of the hermaphrodite flowers but commonly longer and narrower, tapering above, the outer up to ± 2.25 mm., style slightly longer, stigmas distinctly longer and often equalling the style, linear, divergent or suberect; anthers absent, filaments reduced.

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    Capsule rotund, compressed ± 1 mm.

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    Seed reniform, ± 0.6–0.8 mm., black, shining, the testa almost smooth in the centre, faintly reticulate around the margin.

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    Tepals ± densely lanate dorsally.

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    Spikes sessile, solitary or usually in axillary clusters on the main stems or long to very short axillary branches, 0.4–1.5(–2) × 0.3–0.4 cm., divergent, cylindrical, silky, white to creamy, forming a long inflorescence which is leafy to the ultimate spikes; bracts deltoid-ovate to oblong-ovate, 0.75–1 mm., membranous with a short arista formed by the excurrent midrib, pilose, persistent; bracteoles similar or slightly smaller, also persistent.

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    Leaves alternate, round to lanceolate- or ovate-elliptic, shortly or more longly cuneate at the base, rounded and apiculate to acute at the apex, commonly densely lanate or canescent on the lower surface and more thinly so above, sometimes subglabrous on the upper surface, rarely glabrous throughout or thickly lanuginose, those of the main stem 10–50 × 5–35 mm., those of the branches and upper part of the stem reducing and often becoming very small; petioles from 2 cm. down to almost none.

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    Stem and branches terete, striate, ± densely lanate with whitish ± shaggy hairs, more rarely tomentose or canescent.

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    Ecology

    In moister localities than the above (Aerva javanica).

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     Information From

    Amaranthaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Plants Of the World Online Portal - FZ
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • B
    Plants Of the World Online Portal - FTEA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • C
    Plants Of the World Online Portal - FWTA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • D The Trustees of the Royal Botanic Gardens, Kew