Hannonia
Genus of flowering plants
From Wikipedia, the free encyclopedia
Hannonia is a genus of plants in the Amaryllis family.[2] It contains only one known species, Hannonia hesperidum, endemic to Morocco and confined to Western Morocco, Promontory of Hercules.[3][4][5] The specific epithet comes from Greek έσπερος, of evening, as the flowers open in the late afternoon.
| Hannonia | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Embryophytes |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Amaryllidaceae |
| Subfamily: | Amaryllidoideae |
| Genus: | Hannonia Braun-Blanq. & Maire[1] |
| Species: | H. hesperidum |
| Binomial name | |
| Hannonia hesperidum Braun-Blanq. & Maire[1] | |
Description
The bulbs are 20-25x20 mm., with brown papery tunics; they have a long neck about 4 cm long. The species is hysteranthous. Scape about 10 cm high, 2-edged, a little twisted, hollow (according to;[6] solid according to [7]), terete; umbel two-flowered. Outermost leaf reduced to a scarious sheath with a very short blade, inner leaves 2 or 3, linear, fleshy, glaucous, flat, just 2 mm wide and 20 cm long. Spathe bracts two, free, but appressed to the scape below their middle. The pedicel is 1 cm, green; the perianth has a short green tube, 5 mm, much shorter than the tepal segments, spreading in six white tepals, 15 mm long and 2.5 mm wide, linear-lanceolate, a bit broadened below the apex, gradually attenuate (narrowing) towards the base, subequal (nearly equal), keeled green on the abaxial surface, keel formed by 3 closely spaced veins. The stamens are biseriate, free, inserted at the throat, 3 equaling the tepals, 3 shorter; filaments filiform; anthers dorsifixed (attached to the filaments at their middle), oblong, versatile, yellow; style white, filiform, and terete. Stigma captitate, obscurely 3-lobed. Ovary with 3 locules; ovules 5-6 per locule.[8][6]
Flowering period: late summer. Each flower lasts just one day. No scent. Grows in rock-fissures, a very sandy-gritty soil is needed in cultivation. No water in summer and very little in winter. In areas which experience frost a frost-free bulb frame or a greenhouse have to be used. Full sun.
Taxonomy
This genus was placed in tribe Galantheae by Traub[6] on the basis of morphology only; molecular investigations are inconclusive.[9]
The name Hannonia hesperidum var. legionariorum was coined in 1935[10] for a Moroccan plant initially thought to be a variety of Hannonia hesperidum. The name is, however, now considered a synonym of Vagaria ollivieri in the genus Vagaria.[3][11][12]