''Plectritis macrocera'' is a species of flowering plant in the

honeysuckle family The Caprifoliaceae or honeysuckle family is a clade of dicotyledonous flowering plants consisting of about 860 species, in 33, to 42 genera, with a nearly cosmopolitan distribution. Centres of diversity are found in eastern North America and eas ...

known by the common names longhorn seablush and white plectritis. It is native to western North America from

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columbi ...

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 a common plant in mountains, valleys, open steppe, and coastal habitat types. It is an annual herb growing erect to a maximum height between 60 and 80 centimeters. The widely spaced, paired and oppositely arranged leaves are oval or somewhat oblong, smooth-edged, and up to 4.5 centimeters long by 2 wide. The upper ones lack petioles. The

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 ...

is a dense, cylindrical, headlike cluster of flowers in shades of pale pink to white. The corolla is under a centimeter long and is divided into five lobes and a short, blunt spur.

References

External links

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Jepson Manual Treatment

Washington Burke Museum

Photo gallery
Valerianoideae Flora of California Flora without expected TNC conservation status {{Dipsacales-stub