''Draba sharsmithii'' is an uncommon species of flowering plant in the family
Brassicaceae
Brassicaceae () or (the older) Cruciferae () is a medium-sized and economically important family of flowering plants commonly known as the mustards, the crucifers, or the cabbage family. Most are herbaceous plants, while some are shrubs. The le ...
known by the common names Mt. Whitney draba and Sharsmith's draba.
Description
''Draba sharsmithii'' is a small perennial herb forming dense mats or cushions of hairy, oval-shaped leaves each no more than a centimeter long. The erect
inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...
bears several yellow flowers. The fruit is a twisted, lance-shaped
silique
A silique or siliqua (plural ''siliques'' or ''siliquae'') is a type of fruit (seed capsule) having two fused carpels with the length being more than three times the width. When the length is less than three times the width of the dried fruit i ...
up to 2 centimeters long containing several unwinged seeds.
Distribution
''Draba sharsmithii'' is
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...
to the southern
Sierra Nevada
The Sierra Nevada () is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primarily ...
of
California
California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...
, where it is known from fewer than ten occurrences in rocky
alpine
Alpine may refer to any mountainous region. It may also refer to:
Places Europe
* Alps, a European mountain range
** Alpine states, which overlap with the European range
Australia
* Alpine, New South Wales, a Northern Village
* Alpine National Pa ...
and
subalpine
Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial f ...
habitat.
See also
*
Carl Sharsmith
Carl William Sharsmith (March 14, 1903 – October 14, 1994) was an American naturalist and Yosemite park ranger, notable for his knowledge and interpretation of the natural history of the Sierra Nevada. He taught botany at various universit ...
External links
Jepson Manual Treatment - ''Draba sharsmithii''USDA Plants ProfileFlora of North America''Draba sharsmithii'' - Photo gallery
{{Taxonbar, from=Q5304604
sharsmithii
Endemic flora of California
Flora of the Sierra Nevada (United States)
Plants described in 1991
Critically endangered flora of California