Flora of the Hawaiian Islands
Dicotyledon Literature for Castilleja arvensis
Wagner et al., 1990, 1999.
   Orobanchaceae Bibliography
      Castilleja arvensis
General Information
DistributionNative from Mexico south to Brazil and Peru.In the Hawaiian Islands, naturalized on Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Hawai`i.

Orobanchaceae - Castilleja arvensis Orobanchaceae - Castilleja arvensis

Annual herbs 1-8 dm tall; stems erect, unbranched or occasionally sparingly branched usually above the middle, villous and glandular pubescent to hirsute.
Leaves often early deciduous, lanceolate to oblanceolate or linear-elliptic, 1-6 cm long, 0.3-1.5 cm wide, conspicuously 3-nerved from the base, puberulent and also sparsely hirtellous, especially along the veins, margins entire, apex acute to broadly acute, base attenuate.
Flowers in dense spikes, these elongating so that older flowers are widely spaced, bracts leaf-like, narrowly lanceolate to oblong, lower ones green, upper ones tipped with red, orange, or occasionally yellow; calyx 10-12 mm long, tomentose and usually glandular puberulent; corolla greenish, ca. 10 mm long, usually slightly shorter than calyx, the hood puberulent, lower lip minute, ca. 1 mm long; stigma 2-lobed.
Capsules globose-obovoid, 5-6 mm long, rupturing the calyces as they expand, base oblique.
Seeds slightly irregular, usually cuneate, 0.7-1 mm long.
2n = 24