Flora of North America species comparison

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Ceanothus lemmonii

Ceanothus martini

Lemmon's ceanothus

Utah Mountain lilac
Habit Shrubs, evergreen, 0.5–1 m. Stems ascending to spreading, not rooting at nodes; branchlets pale green to grayish green and glaucous, not thorn-tipped, round in cross section, flexible to ± rigid, sparsely villosulous. Shrubs, deciduous, 0.5–1 m. Stems erect, ascending, or spreading, not rooting at nodes; branchlets green to grayish green or brown, not thorn-tipped, glaucous, round in cross section, flexible or ± rigid, strigillose.
Leaves

petiole 2–6 mm;

blade flat, narrowly elliptic to oblong-elliptic, 13–35 × 6–15 mm, base cuneate to rounded, margins serrulate to denticulate most of length, not revolute, not wavy, teeth 34–45, apex acute to obtuse, abaxial surface pale green to grayish green and glaucous, villosulous, especially on veins, adaxial surface green, strigillose; pinnately veined or weakly 3-veined from base.

not fascicled;

petiole (1–)3–7 mm;

blade flat, widely elliptic to suborbiculate, 12–30 × 8–20 mm, base rounded or ± cuneate, margins entire or serrulate distal to middle, not revolute, teeth 23–41, apex obtuse or rounded, abaxial surface pale green, glabrous or veins puberulent, adaxial surface green, slightly shiny, glabrous, veins strigillose; 3-veined from base.
Inflorescences

axillary or terminal, umbel-like to racemelike, 2–6.5 cm.

axillary, umbel-like or racemelike, 1.5–4 cm.
Flowers

sepals, petals, and nectary pale to deep blue.

sepals and petals white;

nectary pale yellow to yellow-green.
Capsules

3–4 mm wide, lobed near apex;

valves smooth, crested.

4–5 mm wide, lobed;

valves smooth or ± rugulose, crested.
2n

= 24.

Ceanothus lemmonii

Ceanothus martini
Phenology Flowering Apr–May. Flowering May–Jul.
Habitat Rocky slopes and flats, open sites, conifer forests, oak and pine woodlands. Rocky soils, shrublands, pine-oak and pinyon pine-juniper woodlands, open sites in conifer forests.
Elevation 200–1300 m. (700–4300 ft.) 1800–3200 m. (5900–10500 ft.)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CO; NV; UT; WY
Discussion

Ceanothus lemmonii occurs in the inner North Coast Ranges, Klamath Mountains, and the western slope of the Cascade Range and northern Sierra Nevada. H. McMinn (1944) reported putative hybrids with C. foliosus, C. integerrimus, and C. oliganthus var. sorediatus.

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

Leaves of Ceanothus martini are similar to those of C. ×lorenzenii and small-leaved forms of C. velutinus, with which it has sometimes been confused.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 94. FNA vol. 12, p. 84.
Parent taxa Rhamnaceae > Ceanothus > subg. Ceanothus Rhamnaceae > Ceanothus > subg. Ceanothus
Sibling taxa
C. americanus, C. arboreus, C. arcuatus, C. confusus, C. cordulatus, C. crassifolius, C. cuneatus, C. cyaneus, C. dentatus, C. divergens, C. diversifolius, C. fendleri, C. ferrisiae, C. foliosus, C. fresnensis, C. gloriosus, C. griseus, C. hearstiorum, C. herbaceus, C. impressus, C. incanus, C. integerrimus, C. jepsonii, C. leucodermis, C. maritimus, C. martini, C. masonii, C. megacarpus, C. microphyllus, C. oliganthus, C. ophiochilus, C. otayensis, C. palmeri, C. papillosus, C. parryi, C. parvifolius, C. pauciflorus, C. perplexans, C. pinetorum, C. prostratus, C. pumilus, C. purpureus, C. roderickii, C. sanguineus, C. sonomensis, C. spinosus, C. thyrsiflorus, C. tomentosus, C. velutinus, C. verrucosus
C. americanus, C. arboreus, C. arcuatus, C. confusus, C. cordulatus, C. crassifolius, C. cuneatus, C. cyaneus, C. dentatus, C. divergens, C. diversifolius, C. fendleri, C. ferrisiae, C. foliosus, C. fresnensis, C. gloriosus, C. griseus, C. hearstiorum, C. herbaceus, C. impressus, C. incanus, C. integerrimus, C. jepsonii, C. lemmonii, C. leucodermis, C. maritimus, C. masonii, C. megacarpus, C. microphyllus, C. oliganthus, C. ophiochilus, C. otayensis, C. palmeri, C. papillosus, C. parryi, C. parvifolius, C. pauciflorus, C. perplexans, C. pinetorum, C. prostratus, C. pumilus, C. purpureus, C. roderickii, C. sanguineus, C. sonomensis, C. spinosus, C. thyrsiflorus, C. tomentosus, C. velutinus, C. verrucosus
Synonyms C. utahensis
Name authority Parry: Proc. Davenport Acad. Nat. Sci. 5: 192. (1889) — (as lemmoni) M. E. Jones: Contr. W. Bot. 8: 41. (1898)
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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