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Haworthias are small succulent plants, forming rosettes of leaves from 3 cm (1.2 in) to exceptionally 30 cm (12 in) in diameter, depending on the species. These rosettes are usually stemless but in some species stems reach up to 50 cm (20 in). The inflorescences of some species may exceed 40 cm (16 in) in height.
Pods are about 6.5 cm × 1.5 cm (2.6 in × 0.6 in), flat, cartilaginous, glaucous, transversely veined with undulate margins. They are initially straight but on maturity become twisted with irregular spirals. Seeds are transversely held in the pod, broadly ovate to elliptical, about 4–6 mm x 3–4 mm (0.16-0.24 in x 0.12-0.16 in).
[3] [6] Yucca rupicola forms colonies of rosettes, lacking trunks above-ground but producing a branched caudex under the surface. Leaves are narrowly lanceolate, slightly succulent, twisted, up to 60 cm long but about 40 mm wide at its widest point. Flowers are pendant (drooping), bell-shaped, white or greenish. Fruit is a dry capsule up to 6 ...
The style is variable in length, from less than 0.5 mm (subsessile stigma) to more than 30 cm in certain varieties of maize, which is known as corn silk. It is usually borne at the apex of the ovary, but may be lateral or apparently borne at the base (gynobasic style). [20] From the anatomical point of view, the style can be solid or hollow.
[3] Vallisneria spiralis was already being used as an aquarium plant in 1856, as shown in this illustration from that time. One form of this plant has been described: V. spiralis f. tortifolia, which has also been elevated to the species level by some taxonomists under the name V. tortissima. The form has tightly twisted leaves.
The leaves are flat linear, 3–8 cm (1.2–3.1 in) long and 2–5 mm (0.079–0.197 in) broad. They are arranged spirally on the shoot but twisted at the base to appear in two or four flattened ranks. As the leaves mature, they develop from bright lime-green to a more yellowish-green. [8]
Arranged in loose panicles above the leafy stems, the capitula are 3–3.5 cm (1 + 1 ⁄ 4 – 1 + 1 ⁄ 2 in) in diameter. Each has 8–18 orange-yellow ray florets, 6–15 millimetres (1 ⁄ 4 – 9 ⁄ 16 in) in length, [2] and yellow or purple-brown disc florets. The fruit measures 3–6 mm (1 ⁄ 8 – 1 ⁄ 4 in) and no pappus is visible. [3]
In the lowest leaves, the leaf stalk is 9–15 cm long, while the leaf blade is twice compounded or deeply divided (or biternate), with the primary leaflets on a short stem of 2–3 cm, the leaflet blades 6-12 × 5–13 cm, those usually incised almost to the base, having three segments, at base extending along the stalk until disappearing (or ...