Vachellia rorudiana (Christoph.) Seigler & Ebinger

국표에 없다.

Familia: Fabaceae
Subfamilia: Caesalpinioideae
Tribus: Acacieae
Genus: Vachellia
Species: Vachellia rorudiana

Name

Vachellia rorudiana (Christoph.) Seigler & Ebinger, 2006

Synonyms

• Basionym
  • Acacia rorudiana Christoph. (1931)
• Heterotypic
  • Acacia tortuosa var. glabrior Hook.f. (1847)

Vachellia rorudiana - Wikispecies (wikimedia.org)

Formal description

Prostrate shrub or small tree to 8 m tall.  Bark not seen.  Twigs dark purplish brown, slightly flexuous, lightly puberulent to pubescent, rarely glabrous.  Short shoots commonly present above the stipular spines, to 5 mm long, covered with acuminate stipules and old leaf bases.  Leaves alternate, the ones clustered on the short shoots commonly 5-45 mm long and with 2 to 12 pinna pairs per leaf, the ones on rapidly growing branches to 170 mm long and with up to 35 pinna pairs.  Stipular spines purplish to yellowish brown, becoming lightgray with age, symmetrical, terete, straight, stout, to 45(55) x 2.5 mm near the base, pubescent at least toward the base.  Petiole adaxially grooved, 2-8 mm long, lightly pubescent; petiolar gland solitary, usually located at or just below the lower pinna pair, stalked, circular to slightly elongated, 0.4-1.1 mm long, apex bulbous, glabrous.  Rachis adaxially grooved, 5-170 mm long, usually lightly pubescent, a stalked, circular to slightly elongated gland, 0.2-0.4 mm across between the upper 1 to 4(6) pinna pairs.  Pinnae 2 to 35 pairs per leaf, 7-25 mm long, 1.0-5.2 mm between pinna pairs.  Petiolules 0.2-1.0 mm long.  Leaflets 11 to 35 pairs per pinna, opposite, 0.2-1.1 mm between leaflets, linear, 0.6-2.8 x 0.3-0.8 mm, mostly glabrous, lateral veins not obvious, only one vein from the base, base oblique, margins ciliate, apex acute.  Inflorescence a densely flowered globose head, 6-10 mm across, solitary or in clusters of 2 to 3 on the short shoots.  Peduncle 14-35 x 0.4-0.7 mm, pubescent.  Involucre 4- to 5- lobed, located at the base of the globose head, glabrous to lightly puberulent, persistent.  Floral bracts spatulate, 1.1-1.6 mm long, ciliate, deciduous.  Flowers sessile, yellow orange: calyx 5-lobed, 0.9-1.7 mm long, the lobes puberulent; corolla 5-lobed, 2.0-2.7 mm long, the lobes puberulent; stamen filaments 2.5-4.0 mm long, distinct; ovary glabrous to lightly pubescent, on a stipe to 0.2 mm long.  Legumes light brown, becoming dark purplish brown with age, straight, flattened to slightly elliptical in cross section, not constricted between the seeds, oblong, 70-175 x 10-17 mm, coriaceous, reticulately striate, glabrous to lightly puberulent, usually glandular with minute purple glands, indehiscent; stipe to 5 mm long, apex acute.  Seeds uniseriate, no pulp, light to dark brown, ovoid, slightly flattened, 5.7-7.5 x 4.5-6.0 mm, smooth; pleurogram U-shaped to oval, 2.7-4.0 mm across. Flowers in October to March, or sporadically when moisture is available. Chromosome number:  Not determined.

Factsheet - rorudiana (cpbr.gov.au)

 

 

 

 

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