Leucospermum glabrum is an evergreen, rounded, upright shrub of up to 2½ m (8 ft) high, that is assigned to the family Proteaceae. It has broad inverted egg-shaped leaves with seven to fourteen teeth near their tips, and oval flower heads of about 8 cm (3.2 in) in diameter, with hairy, orange and carmine-coloured flowers from which long styles with a thickened end emerge, giving the flowerhead as a whole the appearance of a pincushion. It flowers between August and October. Its common name is Outeniqua pincushion in English and Outeniekwa-kreupelhout in Afrikaans. It naturally occurs in a limited area on the south coast of South Africa.[3]
L. glabrum is an upright, rounded shrub of up to 2½ m (8 ft) high, with a central stem at its foot of up to 10 cm (4 in) in diameter, with a reddish brown bark. Its flowering stems are woody and upright, ½–1 cm (0.2–0.4 in) in diameter, initially withsoft but clearly separated hairs which are soon lost. The leaves with a very short stalk, are slightly rising up, inverted egg-shaped to broadly so, wedge-shaped at its base, 8–12 cm (3.2–4.8 in) long and 3–5 cm (1.2–2.0 in) broad, hairless and bright green in colour, with seven to fourteen teeth near the tip.
The flower heads are oval in shape, 7–9 cm (2.8–3.6 in) in diameter, subsessile, usually on its own but sometimes grouped with two or three. The common base of the flowers in the same head is cone-shaped, about 4½ cm (1.8 in) long, and 1¼ cm (0.9 in) wide. The bracts subtending the common base are oval with a curved pointy tip, about 9 mm (0.35 in) long and 6 mm (0.24 in) wide, overlapping and tidily pressed against the surface, rubbery in consistency and softly hairy.
The bracts subtending each individually flower, envelops it at its base, is about 1½ cm (0.6 in) long and 1 cm (0.4 in) wide, with a strongly recurved pointed tip ending in a short thread, and the margins with a regular row of equal hairs, the outside deep carmine in colour in life, rubbery in consistency, densely woolly at base and softly hairy towards the tip. The perianth is about 3½ cm (1.4 in) long, carmine to bright orange in colour. The lower part with the lobes fused (called tube) is about 1 cm (0.4 in) long and lacks hair. The middle part where at least one of the lobes becomes free when the flower opens (called claws), is bright crimson inside the outside of the lobe facing the rim of the head sparsely felty hairy, the outer three densely covered in cringed adpressed hairs. The higher part of the lobes (called limbs) is narrowly elliptic in shape with a pointy tip, variably covered with long soft hairs. The style is stout, 5–6 cm (2.0–2.4 in) long and 2–3 mm (0.08–0.12 in) in diameter, when fully developed slightly curved towards the center of the head. The slightly thickened part at the tip of the style that hovered up the pollen while in the bud called pollen presenter is conical in shape with a pointy tip, about 6 mm (0.24 in) long and half as wide, with a groove that acts as the stigma at the very tip. The ovary is subtended by four triangular, ivory to cream coloured scales of about 1½ mm (0.06 in) long.[2]
L. glabrum differs from other pincushions because of its large inverted egg-shaped, bright green, hairless leaves of 8–12 cm (3.2–4.8 in) long and 3–5 cm (1.2–2.0 in) wide, with seven to fourteen teeth near the tip, the stems hairless when matured and the bracts subtending the common base of the flowers in one head with pointy and recurved tips.[2]
The Outeniqua pincushion was first recognised as a separate species and described by Edwin Percy Phillips in 1910, but the type specimen was already collected in 1814 by English explorer and naturalist William John Burchell.[2] Leucospermum glabrum is assigned to the tree pincushions, section Conocarpodendron.
The name of the species glabrum is Latin and means "hairless", a reference to the lack of hair on the leaves.[4]
The Outeniqua pincushion occurs here and there between the Cradockberg near George and Prince Alfred's Pass near Plettenberg Bay in the southern foothills of the Outeniqua Mountains. It only grows on south-facing, sheltered, cool slopes between of 150–450 m (500–1500 ft) altitude, where it experiences an annual precipitation of 750–1000 mm (30–40 in) more or less evenly distributed over the year. Plants are found in fynbos on moist peat soils between other very tall shrubs such as Laurophyllus capensis, several species of Leucadendron, Berzelia and Erica, forming a dense vegetation called "hygrophilous macchia".[2]
The Outeniqua pincushion is considered an endangered species because there are only fourteen subpopulations. The total population size is falling due to invasive plant species, conversion to forest and the maintenance of fire breaks. Subpopulations strongly fluctuate in size because of wildfires. The total size of the population is below a thousand mature plants. New stands of this species may develop from the underground soil seed bank after a fire and subsequent rains.[3]
Leucospermum glabrum is an evergreen, rounded, upright shrub of up to 2½ m (8 ft) high, that is assigned to the family Proteaceae. It has broad inverted egg-shaped leaves with seven to fourteen teeth near their tips, and oval flower heads of about 8 cm (3.2 in) in diameter, with hairy, orange and carmine-coloured flowers from which long styles with a thickened end emerge, giving the flowerhead as a whole the appearance of a pincushion. It flowers between August and October. Its common name is Outeniqua pincushion in English and Outeniekwa-kreupelhout in Afrikaans. It naturally occurs in a limited area on the south coast of South Africa.
Leucospermum glabrum es una especie de árbol perteneciente a la familia Proteaceae. Es originaria de Sudáfrica.
Leucospermum glabrum es un árbol de hoja perenne, o arbusto leñoso erecto, alcanza un tamaño de 1-2 m de altura. Crece vigorosamente y se mantiene durante muchos años bajo correctas condiciones de crecimiento. Tiene un solo tallo con un tronco grueso, de corteza lisa, arrugada con la edad. Tiene un follaje exuberante y las hojas nuevas aparecen con un rubor de color rojo suave. Las hojas tienen 7-14 dientes glandulares. La inflorescencia está formada por muchas flores de 70-90 mm de diámetro. Las flores son brillantes de color naranja y aparecen entre agosto y octubre. La semillas son ovoides y son liberadas 1-2 meses después de la floración.
Crece en un clima mediterráneo y prefiere laderas frescas y con orientación al sur. Crece bien en turba bien drenada o suelos arenosos, y se presenta en poblaciones aisladas, a una altura de 150-500 m. Su distribución natural es Outeniqua y las montañas Tsitsikama.
Las flores son polinizadas por las aves y una vez que se liberan las semillas, las hormigas dispersan las semillas mediante la introducción de las nueces en sus nidos, donde se almacenan. El fynbos es un ecosistema dependiente del fuego y Leucospermum glabrum se ha adaptado a esto. Durante un incendio, las semillas están seguras en los nidos de hormigas y sobreviven a las llamas para volver a crecer y reemplazar las plantas madres que han muerto en el incendio.
Leucospermum glabrum hace una planta de jardín maravillosa y es ampliamente utilizada como tal por su resistencia. Muchas variedades híbridas de esta especie están disponibles. Esta especie y sus híbridos son ampliamente utilizadas en la industria de la flor cortada.[1]
Leucospermum glabrum fue descrita por Edwin Percy Phillips y publicado en Kew Bulletin 1910, 331.[2][3]
El género Leucospermum deriva de las palabras griegas leukos que significa blanco, y de spermum = semilla, en referencia a las semillas blancas o de color claro de muchas especies.
El epíteto glabrum significa, sin pelos.
Leucospermum glabrum es una especie de árbol perteneciente a la familia Proteaceae. Es originaria de Sudáfrica.
Leucospermum glabrum là một loài thực vật thuộc họ Quắn hoa. Loài này có nguồn gốc Nam Phi.
Leucospermum glabrum là một cây bụi thân gỗ thường xanh hay mọc đứng, đạt chiều cao 1–2 m. Nó phát triển mạnh mẽ và được duy trì trong nhiều năm trong điều kiện tăng trưởng hợp lý. Nó có một gốc duy nhất với một thân cây dày, vỏ cây mịn, nhăn nheo khi tuổi tăng lên. Cụm hoa được hình thành bởi nhiều hoa có đường kính 70–90 mm. Những bông hoa màu cam sáng và xuất hiện từ tháng 8-tháng 10. Những hạt có hình trứng và được tạo ra 1-2 tháng sau khi hoa nở.
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