Castilleja victoriae is described from the vicinity of southwestern Victoria, southern Vancouver Island, British Columbia, Canada and from San Juan Co., Washington, U.S.A. It is an annual member of subg. Colacus (Jeps.) T.I. Chuang & Heckard, sect. Oncorhynchus (Lehm.) T.I. Chuang & Heckard, formerly placed in the genus Orthocarpus Nutt. It is apparently most closely related to either Castilleja ambigua Hook. & Arn. or Castilleja tenuis (A. Heller) T.I. Chuang & Heckard. The new species differs primarily in its uniformly dull reddish-brown floral bracts and calyces, bicolored and unspotted corollas, and restrictive habitat requirements. Several historic populations are extirpated, and of the three extant populations only one consists of enough individuals in a protected location to be considered reasonably secure. We advocate additional surveys of its limited habitat and conservation measures to protect the species.
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18 October 2007
Castilleja victoriae (Orobanchaceae): a New Rare Species from Southeastern Vancouver Island, British Columbia, Canada, and the Adjacent San Juan Islands, Washington, U.S.A
Matt Fairbarns,
J. Mark Egger
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Madroño
Vol. 54 • No. 4
October 2007
Vol. 54 • No. 4
October 2007
British Columbia
Castilleja victoriae
Castillejinae
chromosome number
endangered species
new species
Orobanchaceae