Common Name: HEATH FAMILY Habit: Perennial herb, shrub, tree. Stem: bark often peeling distinctively. Leaf: simple or 0, generally cauline, alternate, opposite (whorled), evergreen or deciduous, often leathery, petioled or not; stipules 0. Inflorescence: raceme, panicle, cyme, or flowers 1, terminal or axillary, generally bracted; pedicel often with 2 bractlets. Flower: generally bisexual, generally radial, bell-shaped, cylindric, or urn-shaped; sepals generally (0)4--5, generally free; petals generally (0)4--5, free or fused; stamens (2--5)8--10, free, filaments rarely appendaged, anthers dehiscing by pores or slits, awns 0 or 2(4), seemingly abaxial, reduced or elongate, generally curved; nectary generally present at ovary base, generally disk-like; ovary superior or inferior, chambers generally 1--5, placentas axile or parietal, ovules 1--many per chamber, style 1, stigma head- to funnel-like or lobed. Fruit: capsule, drupe, berry. Seed: generally many, winged or not. Genera In Family: +- 100 genera, 3000 species: generally worldwide except deserts; some cultivated, especially Arbutus, Arctostaphylos, Rhododendron, Vaccinium. Note: Monophyletic only if Empetraceae included, as treated here. Ledum included in Rhododendron. Non-green plants obtain nutrition from green plants through fungal intermediates. eFlora Treatment Author: Gary D. Wallace, except as noted Scientific Editor: Gary D. Wallace, Thomas J. Rosatti, Bruce G. Baldwin.
Arctostaphylos osoensis P.V. Wells
NATIVE Habit: Erect, 1--4 m. Stem: old stem bark persistent, gray, shredding (smooth); twig (and nascent inflorescence axis) sparsely short-nonglandular-hairy. Leaf: overlapped; petiole < 2 mm; blade 1.5--3 cm, 1.5--2.5 cm wide, ovate to round-ovate, dark green, +- shiny, sparsely short-nonglandular-hairy or glabrous, base deeply lobed, clasping, tip obtuse, margin entire, flat. Inflorescence: +- raceme, 0--1-branched; nascent inflorescence pendent, axis 0.5--1 cm, > 1 mm wide; bracts 4--8 mm, leaf-like, lanceolate to ovate, glabrous; pedicel 8--9 mm, glabrous. Flower: ovary glabrous. Fruit: 5--8 mm wide, depressed-spheric, glabrous; stones free. Chromosomes: 2n=26. Ecology: Dacite (volcanic) outcrops, chaparral; Elevation: 50--375 m. Bioregional Distribution: s CCo (w Los Osos Valley, San Luis Obispo Co.). Flowering Time: Dec--Feb Jepson eFlora Author: V. Thomas Parker, Michael C. Vasey & Jon E. Keeley Reference: Keeley 1997 Madroño 44:109--111; Parker et al. 2007 Madroño 54:148--155 Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Listed on CNPS Rare Plant Inventory Previous taxon: Arctostaphylos ohloneana Next taxon: Arctostaphylos otayensis
Citation for this treatment: V. Thomas Parker, Michael C. Vasey & Jon E. Keeley 2012, Arctostaphylos osoensis, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=74486, accessed on October 03, 2023.
Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on October 03, 2023.
Geographic subdivisions for Arctostaphylos osoensis:
s CCo (w Los Osos Valley, San Luis Obispo Co.).
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(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
Data provided by the participants of the
Consortium of California Herbaria.
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CCH collections by month
Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).