| 翻訳と辞書 |
| Dudleya blochmaniae ssp. brevifolia ： ウィキペディア英語版 |
Dudleya blochmaniae subsp. brevifolia
''Dudleya blochmaniae'' subsp. ''brevifolia'' is a succulent plant known by the common name Short-leaved Liveforever or Short-leaved Dudleya. This plant is a rare subspecies of ''Dudleya blochmaniae'' with an extremely limited and endemic range in San Diego County, California.
==Description==
It grows into a somewhat erect, small (1–4 cm), cryptic, and corm-like succulent perennial with cone-shaped leaves along its hidden stem. It may be brown, reddish-purple, or greenish and bears a branching inflorescence with a few flowers per branch, each opening into a star-shaped bloom with five pointed petals. It sprouts after significant winter rains (December to February) and flowers from May to June. It produces a many-seeded fruit from a simple pistil, which disperses seeds along a single suture. It is only found on bare surface hardpans of Torrey sandstone with minimal topsoil. Small marble-sized, iron-bearing granules are present at all sites and are likely an edaphic requirement.
Total population estimates vary by year and by researcher. Extensive studies have been completed on Carmel Mountain, Carmel Valley, San Diego. The Multiple Species Conservation Program (MSCP) of San Diego County estimated the Carmel Mountain population at just 1446 individuals in 2002, and at 113,134 individuals in 2006. Most recently, in 2008, UCLA faculty Dr. Hartmut S. Walter and Matthew Luskin estimated the Carmel Mountain population at over 100,000 individuals. Their population is highly dependent on rainfall, exploding in population when there is annual rainfall over 10 inches, and drastically shrinking when there is less than 4 inches of annual rainfall.
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「Dudleya blochmaniae subsp. brevifolia」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.
|
|