Clarkia borealis

E. Small

Canad. J. Bot. 49: 1215, figs. 2B, 3A,B. 1971.

Common names: Northern clarkia
Treatment appears in FNA Volume 10.

Stems erect, to 100 cm, puberulent. Leaves: petiole 15–40 mm; blade elliptic to ovate, 2–6 cm. Inflorescences open racemes, axis recurved only at tip in bud, straight 4+ nodes distal to open flowers; buds pendent, fusi­form, base slightly swollen, tip acute. Flowers: floral-tube 2–4 mm; sepals reflexed individ­ually; corolla rotate, petals lavender-pink, often dark-flecked, obdeltate to suborbiculate, unlobed, 13–19 ×7–12 mm, length 1.6–2 times width; stamens 8, sub­equal, sub­tended by ciliate scales, pollen blue-gray; ovary shallowly 4-grooved, puberulent; stigma ex­serted beyond an­thers. Capsules 20–30 mm; pedicel 0–3 mm. Seeds light-brown or mottled with dark spots, 1.5–2.5 mm, mi­nutely tuberculate, crest 0.2 mm.

Discussion

Subspecies 2 (2 in the flora).

Clarkia borealis is closely related, and possibly ancestral, to C. mildrediae. The two species can be distinguished most readily by the degree of curvature of the inflorescence and the petal color.

Selected References

None.

Key

1 Seeds 1.5–1.8 mm. Clarkia borealis subsp. borealis
1 Seeds 1.8–2.5 mm. Clarkia borealis subsp. arida
... more about "Clarkia borealis"
Harlan Lewis† +  and Peter C. Hoch +
E. Small +
straight +
swollen +
indehiscent +  and loculicidal +
denticulate +  and entire +
elliptic +  and ovate +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
pedicellate +  and sessile +
curved +  and straight +
indehiscent +  and loculicidal +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
elongated +
Northern clarkia +
0.2 cm2 mm <br />0.002 m <br /> (?) +
California. +
basifixed +  and versatile +
campanulate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
actinomorphic +
protandrous +  and bisexual +
pedicellate +  and sessile +
curved +  and straight +
indehiscent +  and loculicidal +
terete +, 4-angled +, clavate +, fusiform +, cylindrical +  and elongate +
unicellular-papillose +
deciduous +
subterete +
numerous +  and 1 +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
dark-flecked +  and lavender-pink +
13mm +  and 19mm +
unlobed +, obdeltate +  and suborbiculate +
constricted +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Canad. J. Bot. +
basal +  and cauline +
several +  and 1 +
clavate +  and globose +
mottled +  and light-brown +
few +  and numerous +
tuberculate +
pink +  and purplish red +
deciduous +
0 +  and 1 +
parenchymatous +
parietal +, axile +  and placentation +
1 +, 4 +  and 2 +
unequal +
aquatic +, amphibious +  and terrestrial +
subequal +
2 times as many or as many as sepals +
unbranched +  and sparsely branched +
decumbent +  and prostrate +
puberulent +
slender +  and stout +
0 cm0 mm <br />0 m <br /> (100 cm1,000 mm <br />1 m <br />) +
petiolate +  and sessile +
intrapetiolar +
aquatic +, amphibious +  and terrestrial +
Clarkia borealis +
Clarkia sect. Myxocarpa +
species +
3(-5)-aperturate +
smooth +  and erose +
papillate +