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・ Pentacalia riotintis
・ Pentacalia ruficaulis
・ Pentacalia sevillana
・ Penstemon
・ Penstemon acuminatus
・ Penstemon albomarginatus
・ Penstemon alluviorum
・ Penstemon anguineus
・ Penstemon angustifolius
・ Penstemon attenuatus
・ Penstemon azureus
・ Penstemon barbatus
・ Penstemon barnebyi
・ Penstemon barrettiae
・ Penstemon bicolor
Penstemon caesius
・ Penstemon calcareus
・ Penstemon californicus
・ Penstemon canescens
・ Penstemon centranthifolius
・ Penstemon cinicola
・ Penstemon clevelandii
・ Penstemon clutei
・ Penstemon cobaea
・ Penstemon comarrhenus
・ Penstemon cyaneus
・ Penstemon cyanocaulis
・ Penstemon davidsonii
・ Penstemon debilis
・ Penstemon degeneri


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Penstemon caesius : ウィキペディア英語版
Penstemon caesius

''Penstemon caesius'' is a species of penstemon known by the common name San Bernardino beardtongue. It is endemic to California, where it is known from the San Bernardino and San Gabriel Mountains, as well as the southern mountains of the Sierra Nevada. It is a member of the flora on rocky slopes and in coniferous forests and alpine habitat in the mountains. It is a perennial herb with erect branches up to about 80 centimeters in maximum height. The lower branches may be woody, the upper hairless and waxy, and the inflorescence glandular. Most of the leaves are basal on the plant, rounded or oval, and up to about 4 centimeters long. The inflorescence produces purple-blue tubular flowers roughly 2 centimeters long. The flower has a glandular outer surface, a coat of hairs inside, and a hairless staminode. The flowers of this penstemon are pollinated by bees of genus ''Osmia'', which feed on their nectar.〔Howell, A. D. & R. Alarcón. (2007). ''Osmia'' bees (Hymenoptera: Megachilidae) can detect nectar-rewarding flowers using olfactory cues. ''Animal Behaviour'' 74:2 199-205.

==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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