Ceanothus papillosus |
Ceanothus lemmonii |
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wartleaf ceanothus |
Lemmon's ceanothus |
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Habit | Shrubs, evergreen, 1–5 m. Stems erect to ascending, not rooting at nodes; branchlets green to reddish brown, not thorn-tipped, round in cross section, ± flexible to rigid, densely tomentulose. | 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. |
Leaves | petiole 1–3 mm; blade cupped to flat, linear, narrowly oblong, or oblong-elliptic, 12–50 × 6–15 mm, base obtuse to rounded, margins minutely glandular-denticulate, revolute, glands 17–31, apex obtuse, truncate, or retuse, abaxial surface pale green, densely villosulous to tomentulose, adaxial surface dark green, sparsely puberulent and glandular-papillate; pinnately veined. |
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. |
Inflorescences | axillary or terminal, racemelike, 2–8 cm. |
axillary or terminal, umbel-like to racemelike, 2–6.5 cm. |
Flowers | sepals, petals, and nectary deep blue. |
sepals, petals, and nectary pale to deep blue. |
Capsules | 2–3 mm wide, lobed; valves smooth, viscid when young, not or weakly crested. |
3–4 mm wide, lobed near apex; valves smooth, crested. |
2n | = 24. |
= 24. |
Ceanothus papillosus |
Ceanothus lemmonii |
|
Phenology | Flowering Mar–May. | Flowering Apr–May. |
Habitat | Rocky ridges, slopes, and flats, chaparral, mixed evergreen forests. | Rocky slopes and flats, open sites, conifer forests, oak and pine woodlands. |
Elevation | 20–1500 m. (100–4900 ft.) | 200–1300 m. (700–4300 ft.) |
Distribution |
CA; Mexico (Baja California)
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CA
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Discussion | Ceanothus papillosus occurs in the Coast Ranges from San Francisco Bay south to the Santa Ynez Mountains, Ventura County, with disjunct populations in the Santa Ana Mountains, California, and Cerro Bola, in northern Baja California. The name C. papillosus var. roweanus was originally applied to low-growing plants with ascending to spreading, arcuate branches (H. McMinn 1939). M. Van Rensselaer and McMinn (1942) later emended the circumscription to include plants with linear leaves and retuse to truncate leaf apices, but these are found throughout the range of the species. Leaves with obtuse to truncate or retuse leaf apices also can be found on the same plant. Putative hybrids with C. integerrimus and C. oliganthus have been documented (McMinn 1944). Hybrids with C. thyrsiflorus have been named C. ×regius (Jepson) McMinn. Some putatively advanced generation hybrids have narrowly elliptic, weakly papillate leaves with obtuse apices, and sometimes have been misinterpreted as belonging to C. papillosus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 12, p. 92. | FNA vol. 12, p. 94. |
Parent taxa | Rhamnaceae > Ceanothus > subg. Ceanothus | Rhamnaceae > Ceanothus > subg. Ceanothus |
Sibling taxa | ||
Synonyms | C. papillosus subsp. roweanus, C. papillosus var. roweanus | |
Name authority | Torrey & A. Gray: Fl. N. Amer. 1: 268. (1838) | Parry: Proc. Davenport Acad. Nat. Sci. 5: 192. (1889) — (as lemmoni) |
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