| 翻訳と辞書 |
| Senecio franciscanus ： ウィキペディア英語版 |
Packera franciscana
''Packera franciscana'' (syn. ''Senecio franciscanus'') is a rare species of flowering plant in the aster family known by the common name San Francisco Peaks groundsel, or San Francisco Peaks ragwort. It is endemic to Arizona in the United States, where it is known only from the San Francisco Peaks in Coconino County.〔〔 It is threatened by recreational activities in its habitat. It is a federally listed threatened species of the United States.
==Description==
''Packera franciscana'' is a small rhizomatous perennial herb growing just a few centimeters tall. The purple or purple-tinged stems have woolly or cobwebby fibers. The basal leaves have lyre-shaped to somewhat oval blades measuring up to 2 centimeters long by 5 wide. They have ruffled edges and purple undersides.〔(''Packera franciscana''. ) Center for Plant Conservation. Retrieved July 26, 2011.〕 Leaves higher on the stems are smaller and sometimes divided into lobes.
The inflorescence is a solitary flower head or a few heads clustered together atop the woolly stem. The flower head is enclosed in hairy purple phyllaries and contains 8 or 13 yellow ray florets up to a centimeter long. The fruit is an achene tipped with a pappus half a centimeter in length. Blooming occurs in August through October.〔(''Packera franciscana''. ) Flora of North America. Retrieved July 26, 2011.〕
The plant reproduces sexually via seed, but more often vegetatively by resprouting from its rhizome.〔 Most plants occur in wide patches made up of several cloned stems, but some are solitary, having sprouted from seed.〔USFWS. (''Packera franciscana'' Five-year Review. ) October 2010. Retrieved July 26, 2011.〕
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「Packera franciscana」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|