Perityle cernua

(Greene) Shinners

SouthW. Naturalist 4: 204. 1959.

Common names: Organ Mountain rock daisy
IllustratedEndemicConservation concern
Basionym: Laphamia cernua Greene Bull. Torrey Bot. Club 25: 122, plate 333, figs. 3, 4. 1898
Treatment appears in FNA Volume 21. Treatment on page 318. Mentioned on page 319.
Revision as of 22:48, 29 July 2020 by imported>Volume Importer
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Plants 3–12 (–20) cm (closely appressed to rocks); glabrate or with transparent, multicellular hairs on petioles, peduncles, and phyllaries. Leaves: petioles 7–25 mm; blades ovate-reniform to ovate-cordate, 10–40 × 8–40 mm, margins unevenly serrate-dentate. Heads borne singly (nodding or erect), 10–12 × 12–14 mm. Peduncles 10–19 mm. Involucres broadly campanulate. Phyllaries 18–28, linear-lanceolate, 6–9 × 1.2–2 mm. Disc-florets 20–150; corollas yellow, tubes 1.2–2 mm, throats narrowly funnelform, 2–3.3 mm, lobes 0.7–0.8 mm. Cypselae 2.1–3 mm; pappi of 25–35 bristles 0.5–1.5 (–2) mm. 2n = 34 + 1 frag.


Phenology: Flowering spring–fall.
Habitat: Limestone or igneous cliffs and slopes
Elevation: 1600–3000 m

Discussion

Of conservation concern.

Perityle cernua is known only from the Organ Mountains of Doña Ana County.

Selected References

None.

Lower Taxa

None.
... more about "Perityle cernua"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Sharon C. Yarborough +  and A. Michael Powell +
(Greene) Shinners +
decurrent +
Laphamia cernua +
compound +  and simple +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
ovate-reniform;ovate-cordate +
0.8 cm8 mm <br />0.008 m <br /> (4 cm40 mm <br />0.04 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Organ Mountain rock daisy +
angled +, rounded +, oblong +  and narrowly oblanceolate partially flattened +
fertile +  and bisexual +
fertile +  and bisexual +
1600–3000 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Limestone or igneous cliffs and slopes +
multicellular +
transparent +
discoid +  and radiate +
indeterminate +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
homogamous +  and heterogamous +
1.2 cm12 mm <br />0.012 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
sessile +  and petiolate +
alternate +  and opposite +
deltate +
short-hairy +  and glabrous +
calloused +
2-carpellate +
persistent +
1 cm10 mm <br />0.01 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Flowering spring–fall. +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
18 +  and 28 +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
SouthW. Naturalist +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
Illustrated +, Endemic +  and Conservation concern +
erect +  and pendent +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined sect. Pappothrix +
Perityle cernua +
Perityle sect. Pappothrix +
species +
campanulate +  and cylindric +
0.2 cm2 mm <br />0.002 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
lobed +, toothed +  and entire +
12 cm120 mm <br />0.12 m <br /> (20 cm200 mm <br />0.2 m <br />) +
with transparent , multicellular hairs +  and glabrate +