백녀옹

백녀옹

Espostoopsis속 Buxbaum, Krainz (1968) 백녀옹 속(白麗翁 屬, 1종) - 남미 기둥모형류[Cereeae]
Euancistracantha (미채택) ▶ Mammillaria
Euarthrocereus (미채택) ▶ Arthrocereus
Eubnerella (미채택) ▶ Mammillaria
Eucereus (미채택) ▶ Cereus

국표에는 없는 학명 국명이다.

http://www.cactus.or.kr/cacti_genus.htm

Espostoopsis속은 1종밖에 없다.

Espostoopsis속 Buxbaum, Krainz

 

Espostoopsis dybowskii (Rol.-Goss.) Buxb. in Krainz

Kakteen (H. Krainz) Lief. 39: CVa. 1968

Origin and Habitat: Eastern Bahia (Rio de Contas Valley) and Northern Bahia (município of Jaguarari), Brazil. Extent of occurrence about 18Km2.
Altitude: 300 to 750 metres above sea level.
Habitat and Ecology: It is found in eastern caatinga on gneiss/granite inselbergs or quartzitic rock outcrops, and in some parts of this region the plant dominates the vegetation, forming impenetrable groves. The species has a relatively large extent of occurrence , it has two disjunct locations both affected by several threats which cause a continuing decline in the populations. The major threats are habitat loss for agriculture, cattle ranching, mining, fires and urbanization.

Synonyms

• Austrocephalocereus dybowskii (Rol.-Goss.) Backeb.
• Cephalocereus dybowskii (Rol.-Goss.) Buxb. in Krainz
• Cephalocereus dybowskii Britton & Rose
• Cereus dybowskii Rol.-Goss.
• Coleocephalocereus dybowskii (Rol.-Goss.) F.H.Brandt
• Gerocephalus dybowskii (Rol.-Goss.) F.Ritter

ENGLISH: Cabega
PORTUGUESE (Português): Cabeça-branca, cabeça-de-velho, homem-velho, mandacaru-de-penacho
SWEDISH (Svenska): Ullbuskkaktus

Description: Espostoopsis dybowskii is the only species in the Espostoopsis genus. It is a night blooming cereoid species, mainly branching near the base. The flowers are white, tubular and bell shaped.
Habit: Plants shrubby, mostly branching basally, producing several erect, unbranched stems, 2-4 m high.
Stems: Cylindrical, about 8 cm in diameter, with white hairs completely obscuring them.
Ribs: Numerous (20-28) low.

Areoles: Furnished with matted yellowish wool and abundant white hairs covering the whole stem.
Central spines: 2-3, yellow or brown, erect, needle-like, 2-3 cm long.
Radial spines: Numerous, short, fine, hidden in the areolar hairs.
Fertile zone: Blooms are produced in a lateral cephalium, up to 60 cm long, consisting of masses of long white wool.
Flowers: Nocturnal, shortly tubular-campanulate, white, to 4 cm long; pericarpels naked; floral tubes with very small scales less than 1 mm long, otherwise naked. Tepals short, white.
Fruits: Broadly ovoid, nearly naked, pale pink with white pulp, indehiscent, 2.5 cm in diameter; pericarp thick, floral remains persistent and becoming black.
Seeds: Black, oval to pear shaped, rough, tuberculate.
Remarks: The southern form from a disjunct locations shows some differences (notably smaller stems and more exserted olive-brown fruits) that could justify subspecific status.