familyCistaceae
genusCrocanthemum
speciesCrocanthemum greenei

Crocanthemum greenei

(B. L. Robinson) Sorrie

Phytologia 93: 270. 2011.

Bruce A. Sorrie
Common names: Island rushrose
Conservation concernEndemic
Basionym: Helianthemum greenei B. L. Robinson in A. Gray et al., Syn. Fl. N. Amer. 1(1,1): 191. 1895,
Treatment appears in FNA Volume 6. Treatment on page 406. Mentioned on page 401.
Revision as of 10:40, 30 July 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Subshrubs. Stems erect, 15–30 cm, sparsely to densely stellate-pubescent, distally with dense, dark, glandular-hairs 0.4–0.8 mm. Leaves cauline; petiole 0–2.5 mm; blade oblanceolate to linearlanceolate, 7–25 (–35) × 2–4 (–7) mm, margins nonrevolute, surfaces stellate-pubescent, lateral-veins obscure abaxially. Inflorescences terminal, corymbose; chasmogamous flowers 3–25 per corymb, cleistogamous 0. Pedicels 1–4 (–6) mm, stellate-pubescent and densely glandular-hairy; bracts 3–10 × 0.5–1.5 mm. Chasmogamous flowers: outer sepals lanceolate, 2.5–4 × 0.5–1 mm, inner sepals 4.5–8 × 3–4 mm, apex acuminate; calyx strigose (sometimes also short-stellate-hairy), hairs simple, 1–1.7 mm; petals obovate, 5–8 × 3–4 mm; capsules 4.3–6 × 3–3.5 mm, glabrous.


Phenology: Flowering Apr–May.
Habitat: Dry, rocky ridges
Elevation: 10–100 m

Distribution

V6 767-distribution-map.jpg

Calif.

Discussion

Crocanthemum greenei has been documented from San Miguel, Santa Catalina, Santa Cruz, and Santa Rosa islands. According to the California Native Plant Society, it is extant on Santa Catalina, Santa Cruz, and Santa Rosa islands, totaling about 20 populations and listed federally as threatened. Threats are from non-native mammals and plants. The habit, dense, dark glandular hairs on stems and pedicels, and long, white hairs on the calyx distinguish C. greenei.

Selected References

None.

Lower Taxa

None.
... more about "Crocanthemum greenei"
RDF feed
Apex shape
acuminate +
Author
Bruce A. Sorrie +
Authority
(B. L. Robinson) Sorrie +
Basionyms
Helianthemum greenei +
Blade architecture
veined +
Blade quantity
3;45 +
Blade shape
oblanceolate +
Bract length
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Bract presence
absent +
Bract width
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Calyx pubescence
strigose +
Capsule length
0.43 cm4.3 mm <br />0.0043 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Capsule pubescence
glabrous +
Capsule width
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Common name
Island rushrose +
Distribution
Calif. +
Elevation
10–100 m +
Filament fusion
connate +  and distinct +
Flower architecture or arrangement or growth form
solitary +
Flower presence
absent +
Flower quantity
3;25 +
Flower reproduction
chasmogamous +  and cleistogamous +
Fruit architecture
capsular +
Fruit dehiscence
loculicidal +
Glandular-hair some measurement
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Habitat
Dry, rocky ridges +
Hair architecture
simple +
Hair quantity
1;20 +
Hair some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
Illustration copyright
Flora of North America Association +
Illustrator
John Myers +
Inflorescence architecture
umbellate +, thyrsiform +  and cymose +
Inflorescence arrangement
corymbose +
Inflorescence position or structure subtype
terminal +
Inner sepal length
0.45 cm4.5 mm <br />0.0045 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Inner sepal width
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Lateral-vein atypical length
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Lateral-vein atypical width
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Lateral-vein length
0.7 cm7 mm <br />0.007 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Lateral-vein prominence
obscure +
Lateral-vein pubescence
stellate-pubescent +
Lateral-vein width
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Leaf architecture
stipulate +  and estipulate +
Leaf arrangement
whorled +, opposite +  and alternate +
Leaf position
cauline +
Margin architecture or shape
entire +
Margin atypical length
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Margin atypical width
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Margin length
0.7 cm7 mm <br />0.007 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Margin prominence
obscure +
Margin pubescence
stellate-pubescent +
Margin shape
undulate +  and revolute +
Margin width
2mm;4mm +
Number of lower taxa
0 +
Outer integument width
thin +
Outer sepal length
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Outer sepal shape
lanceolate +
Outer sepal width
0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +  and 0.1 cm1 mm <br />0.001 m <br /> (?) +
Ovary architecture
6-12-carpellate +, 5-carpellate +, 3-carpellate +  and 2-carpellate +
Ovary placentation
parietal +
Ovary position
superior +
Ovule architecture
crassinucellate +  and bitegmic +
Ovule orientation
orthotropous +
Pedicel atypical some measurement
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Pedicel presence
absent +
Pedicel pubescence
glandular-hairy +  and stellate-pubescent +
Pedicel some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Petal arrangement
crumpled +  and imbricate +
Petal coloration
yellow +, white +, red +, purple +, pink +, dark red +  and green +
Petal duration
caducous +
Petal fusion
distinct +
Petal length
5mm;8mm +
Petal presence
absent +
Petal quantity
3;5 +
Petal shape
obovate +
Petal width
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Petiole some measurement
0 cm0 mm <br />0 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Phenology
Flowering Apr–May. +
Publication title
Phytologia +
Publication year
2011 +
Reference
None +
Seed atypical quantity
1 (3) +
Seed quantity
3;800 +
Sepal duration
persistent +
Sepal life cycle
falling +
Sepal quantity
3;5 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V6/V6 767.xml +
Special status
Conservation concern +  and Endemic +
Stamen atypical quantity
3 (5) +
Stamen quantity
5;150 +
Stem coloration
dark +
Stem growth form
not dimorphic +
Stem orientation
erect +
Stem pubescence
stellate-pubescent +
Stem some measurement
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
Stigma quantity
3 +  and 1 +
Stipule architecture
sessile +  and petiolate +
Stipule duration
caducous +
Style presence
absent +
Style quantity
1 +
Surface atypical length
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Surface atypical width
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Surface length
0.7 cm7 mm <br />0.007 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Surface prominence
obscure +
Surface pubescence
stellate-pubescent +
Surface width
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Synonyms
Helianthemum subg. Lecheoides +
Taxon family
Cistaceae +
Taxon name
Crocanthemum greenei +
Taxon parent
Crocanthemum +
Taxon rank
species +
Volume
Volume 6 +
Whole organism duration
perennial +
Whole organism growth form
subshrub +
Whole organism pubescence
hairy +
Whole organism some measurement
0.4dm (8dm) +
X chromosome quantity
10 +