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''Opuntia aciculata'', also called Chenille pricklypear, old man's whiskers and cowboy’s red whiskers,〔 is a perennial dicot and an attractive ornamental cactus native to Texas. It belongs to the genus ''Opuntia'' prickly pear cacti. It is also widespread in Nuevo Leon, Tamaulipas (North Mexico). It was reported from Nuevo León, Mexico, according to D. Weniger in 1970.〔(【引用サイトリンク】url=http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242415193 )〕 The species name ''aciculata'' derives from many sources: the Latin word ''acicula'' which means “a small pin for a headdress”, and the adjectival suffix for nouns ''atus'', meaning possessive of or likeness to something (with, shaped, made), while for verb participles it means a completed action. Chenille prickly pear, one of its vernacular names, comes for the fringe of spines around the edge of the pad. The specific name also means "covered with small pins".〔(【引用サイトリンク】title=Opuntia aciculata (Syn: Opuntia engelmannii var. aciculata) )〕〔(【引用サイトリンク】url=http://www.cactus-art.biz/schede/OPUNTIA/Opuntia_aciculata/Opuntia_aciculata/Opuntia_aciculata.htm )〕 ==Description== This plant grows numerous stems covered with spines. The stems have segments partly rounded at the apex. They are faded and dull grey-green, more or less glaucous.〔 They measure 10–20 cm in length. The leaves are acicular and ephemeral. The aeroles are often spineless with symmetrical regularity of them on the body. They are large, widely separated. It has numerous glochids or microspines, 3–12 mm long, acicular, slender, spreading, forming a dense cluster. They are normally golden yellow to dark red in colour. It has often no spines, or rarely one to three, which are reflexed. They are of a yellowish or toasted colour with a brownish base, up to 3 cm in length.〔 They are often folded and seemingly deciduous. It has broad, point-tipped blossoms colored golden yellow, orange, or red and of diameter 8–10 cm. Several sources report the flowers as being yellow in color, but the plants in cultivation usually have bright red-orange flowers, and sometimes the centre is greenish. Petals are broad-rounded or retuse, filaments are yellowish and the stigma dull yellowish with eight to 10 green lobes. They mostly flower in early summer or spring. The plant's fruits are usually pear-shaped, covered with fine spines and glochids, and are purple or green.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Opuntia aciculata」の詳細全文を読む スポンサード リンク
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