Flora of North America species comparison

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Clarkia purpurea

Clarkia lassenensis

purple clarkia, winecup clarkia, winecup fairyfan

Lassen clarkia, Lassen clarkia or godetia, Mount Lassen godetia, Mt. Lassen clarkia, Mt. Lassen fairy-fan
Stems

erect or rarely decumbent, to 100 cm, glabrous and sometimes glaucous or sparsely to densely puberulent, sometimes mixed with longer, spreading hairs.

erect, to 90 cm, puberulent.
Leaves

petiole 0–2 mm;

blade linear or narrowly lanceolate to elliptic or ovate, 1.5–7 cm.

petiole to 10 mm;

blade linear to narrow lanceolate, 2–5 cm.
Inflorescences

open or dense racemes, axis straight;

buds erect.

racemes, axis recurved at tip in bud;

buds pendent.
Flowers

floral tube 2–10 mm;

sepals reflexed individually or in pairs;

corolla bowl-shaped, petals lavender to purple, purplish red, or dark wine-red, often with red or purple spot near middle, tip, or base, 9–25 mm;

stamens 8, subequal;

ovary 8-grooved, length less than 8 times width;

stigma as long as or exserted beyond anthers.

floral tube 3–5 mm;

corolla bowl-shaped, petals pinkish lavender shading lighter proximally, with reddish purple base, broadly obovate, 8–16 mm;

stamens 8, subequal;

ovary 8-grooved, densely puberulent;

stigma not exserted beyond anthers.
Capsules

10–30 mm, beak 0–2 mm.

25–40 mm;

pedicel 0–3 mm.
Seeds

brown or gray, 1–2 mm, scaly, crest 0.2 mm.

light brown or mottled with dark spots, 1.5 mm, minutely tuberculate, crest 0.2 mm.
2n

= 14.

Clarkia purpurea

Clarkia lassenensis
Phenology Flowering May–Jun.
Habitat Woodlands, conifer forests.
Elevation 500–2000 m. (1600–6600 ft.)
Distribution
from USDA
w North America; nw Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; NV; OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 3 (3 in the flora).

Clarkia purpurea consists of a diverse assemblage of hexaploid populations and is almost certainly derived from multiple origins followed by hybridization and, perhaps, backcrossing to parental species. Three morphological forms are recognized as subspecies; intergrades are frequent.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Clarkia lassenensis is found primarily in the northeastern counties of California, south-central counties of Oregon, and northwestern counties of Nevada, with a few outlier collections from Alpine and Placer counties in the Sierra Nevada, and from northern Mendocino and Glenn counties in the North Coast Ranges.

Clarkia lassenensis is morphologically most similar to C. arcuata and C. gracilis. At one time, C. lassenensis was considered a probable parent of the tetraploid C. gracilis but cytogenetic and molecular sequence data indicate that an unknown related species, presumably now extinct, was involved. Clarkia lassenensis can be distinguished readily from C. arcuata by flower size, position of the stigma, and pubescence of the immature capsule, and from C. gracilis by having immature capsules with eight grooves rather than four.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Leaf blades broadly lanceolate to elliptic or ovate; inflorescences dense racemes.
subsp. purpurea
1. Leaf blades linear to lanceolate or narrowly lanceolate; inflorescences usually open racemes.
→ 2
2. Petals 15–25 mm; stigmas exserted beyond anthers.
subsp. viminea
2. Petals 9–14 mm; stigmas not exserted beyond anthers.
subsp. quadrivulnera
Source FNA vol. 10. FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Clarkia > sect. Godetia Onagraceae > subfam. Onagroideae > tribe Onagreae > Clarkia > sect. Rhodanthos > subsect. Flexicaules
Sibling taxa
C. affinis, C. amoena, C. arcuata, C. australis, C. biloba, C. borealis, C. bottae, C. breweri, C. concinna, C. cylindrica, C. davyi, C. delicata, C. dudleyana, C. epilobioides, C. exilis, C. franciscana, C. gracilis, C. heterandra, C. imbricata, C. jolonensis, C. lassenensis, C. lewisii, C. lingulata, C. mildrediae, C. modesta, C. mosquinii, C. prostrata, C. pulchella, C. rhomboidea, C. rostrata, C. rubicunda, C. similis, C. speciosa, C. springvillensis, C. stellata, C. tembloriensis, C. unguiculata, C. virgata, C. williamsonii, C. xantiana
C. affinis, C. amoena, C. arcuata, C. australis, C. biloba, C. borealis, C. bottae, C. breweri, C. concinna, C. cylindrica, C. davyi, C. delicata, C. dudleyana, C. epilobioides, C. exilis, C. franciscana, C. gracilis, C. heterandra, C. imbricata, C. jolonensis, C. lewisii, C. lingulata, C. mildrediae, C. modesta, C. mosquinii, C. prostrata, C. pulchella, C. purpurea, C. rhomboidea, C. rostrata, C. rubicunda, C. similis, C. speciosa, C. springvillensis, C. stellata, C. tembloriensis, C. unguiculata, C. virgata, C. williamsonii, C. xantiana
Subordinate taxa
C. purpurea subsp. purpurea, C. purpurea subsp. quadrivulnera, C. purpurea subsp. viminea
Synonyms Oenothera purpurea, Godetia purpurea Godetia lassenensis
Name authority (Curtis) A. Nelson & J. F. Macbride: Bot. Gaz. 65: 64. (1918) (Eastwood) H. Lewis & M. E. Lewis: Madroño 12: 33. (1953)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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