Arctostaphylos morroensis |
Arctostaphylos pilosula |
|
---|---|---|
Morro manzanita |
La Panza manzanita, Santa Margarita manzanita |
|
Habit | Shrubs, erect or mound-forming, 1–4 m; burl absent; bark on older stems persistent, gray, shredded; twigs short-hairy with long, white hairs. | Shrubs, erect, 1–5 m; burl absent; twigs short-hairy and hispid. |
Leaves | bifacial in stomatal distribution; petiole 2–5 mm; blade dull gray abaxially, dark green, ± shiny adaxially, oblong-ovate to oblong-elliptic, 1.5–3 × 1–2 cm, base subcordate to ± truncate (sometimes with vestigial auricles), margins entire, cupped, abaxial surface smooth, densely tomentose, adaxial surface smooth, glabrous. |
petiole 4–8 mm; blade dark green to gray-glaucous, dull, narrowly elliptic to orbiculate-ovate, 1–3 × 1–2 cm, base cuneate or truncate to slightly lobed, margins entire, plane, surfaces smooth, glabrous. |
Inflorescences | panicles, 2–5-branched; immature inflorescence pendent, (branches congested, bell-shaped, partly framed by bracts), axis 0.5–0.8 cm, 1+ mm diam., short-hairy with long, white hairs; bracts not appressed, leaflike, linear-lanceolate, 5–8 mm, apex acuminate, surfaces puberulent. |
racemes, simple or 1-branched; immature inflorescence pendent, axis 1–2 cm, 1+ mm diam., short-hairy with long hairs; bracts not appressed, (green), leaflike, lanceolate, 8–15 mm, apex acute, surfaces long-hairy. |
Pedicels | 4–6 mm, hairy or glabrous. |
2–5 mm, glabrous. |
Flowers | corolla white, urceolate; ovary densely white-hairy. |
corolla white to pink, urceolate; ovary glabrous. |
Fruits | depressed-globose, 7–10 mm diam., sparsely hairy. |
depressed-globose, 8–10 mm diam., glabrous. |
Stones | distinct. |
distinct. |
2n | = 26. |
= 26. |
Arctostaphylos morroensis |
Arctostaphylos pilosula |
|
Phenology | Flowering winter–early spring. | Flowering winter–early spring. |
Habitat | Maritime chaparral on sandy soils near coast | Chaparral, open forests |
Elevation | 0-100 m (0-300 ft) | 0-1200 m (0-3900 ft) |
Distribution |
CA
|
CA
|
Discussion | Of conservation concern. Arctostaphylos morroensis is known from the Morro Bay region in San Luis Obispo County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Arctostaphylos pilosula occurs in San Luis Obispo County and exhibits some variation in leaf shape and color, as well as indument. Plants at higher elevations and farther inland may reflect introgression with A. glauca. Some lower-elevation populations historically have been segregated as subsp. pismoensis or A. wellsii. Field observation suggests that there is a morphological cline between coastal and interior populations so that taxonomic distinctions between these populations are unwarranted. Further taxonomic analysis might help to resolve this situation. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 432. | FNA vol. 8, p. 426. |
Parent taxa | Ericaceae > subfam. Arbutoideae > Arctostaphylos | Ericaceae > subfam. Arbutoideae > Arctostaphylos |
Sibling taxa | ||
Synonyms | A. pilosula subsp. pismoensis, A. wellsii | |
Name authority | Wieslander & B. Schreiber: Madroño 5: 42, fig. 2a. 1939 , | Jepson & Wieslander: Erythea 8: 101. 1938 , |
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