Orthrosanthus Sweet

Genus

Angiosperms > Asparagales > Iridaceae

Characteristics

Tufted, rhizomatous, evergreen perennial herbs. Basal leaves numerous, equitant, linear, erect. Scapes erect, terete, often with 1-3 reduced leaves. Inflorescence compound, branched, with rhipidia (rarely single flowers) each enclosed at the base by 2 herbaceous spathes. Flowers actinomorphic, fugacious, almost sessile. Floral tube less than 2 mm long. Sepals and petals shortly united, spreading, equal or sub-equal, with distinct midveins, blue. Stamens exserted, erect; filaments connate at the base or free; anthers dorsifixed, with prominent connectives, yellow. Style deeply trifid, branches entire, terete, minutely channelled, projecting horizontally between stamens; stigmas terminal, minute. Ovary trigonous-ellipsoid, enclosed by bracteole or spathe. Capsule ovoid-trigonous, on short pedicel. Seeds several in each locule; testa rugose, brown.
More
Rhizomatous herbs with the habit of an Iris or a gigantic Sisyrinchium; leaves chiefly basal, but more sparse and also reduced up-ward on the extensively branched flowering stem, dis tic ho us, equitant; inflorescence loosely paniculate, bearing several or many rather handsome, virtually sessile, blue flow-ers of moderate size; perianth tube very short, the lobes subequal, spreading; stamens inserted at the base of the perianth; fila-ments free or connate at the very base; an-thers linear, erect; ovary clavate, 3-celled; style very short; stigma branches subulate; fruit a loculicidally 3-valved capsule.
Life form perennial
Growth form herb
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Foliage retention evergreen
Sexuality hermaphrodite
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Hardiness (USDA) 9-12

Usage

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Cultivation

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