Arctostaphylos pilosula

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Arctostaphylos pilosula
Arctostaphylos pilosula.jpg
Status TNC G2.svg
Imperiled  (NatureServe) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Ericaceae
Genus: Arctostaphylos
Species:
A. pilosula
Binomial name
Arctostaphylos pilosula
Jeps. & Wies. ex Jeps.

Arctostaphylos pilosula is a species of manzanita, known by the common names La Panza manzanita and Santa Margarita manzanita, that is endemic to California. [2] [3]

Contents

Its common names comes from populations on the La Panza Range, near the town of Santa Margarita. [2]

Distribution

The plant is endemic San Luis Obispo County, found in three areas: the La Panza Range, the east slope of the Santa Lucia Mountains near Atascadero, and in the San Luis Range near Pismo Beach. [2]

It grows in chaparral and closed-cone pine forest habitats, on shale and sandstone outcrops and slopes. It is found at elevations of 30–1,250 metres (98–4,101 ft). [2] [3]

Description

Arctostaphylos pilosula is an erect and bristly shrub growing 1–5 metres (3.3–16.4 ft) in height. [2] [3]

The leaves are a round, oval shape and dull and hairless in texture. They grow up to 3 centimetres (1.2 in) long. [3]

The shrub blooms in spherical white inflorescences of cone-shaped and downward facing "manzanita" flowers, each just under 1 centimetre (0.39 in) long. Its bloom period is December to March. [3]

The fruit is a reddish-brown drupe about a centimeter wide, that ripen in the summer. [3]

Conservation

The species is listed on the California Native Plant Society Inventory of Rare and Endangered Plants as a fairly endangered and vulnerable species. [4]

References

  1. ↑ "NatureServe Explorer 2.0".
  2. 1 2 3 4 5 "Field Guide to Manzanitas," Michael Kauffmann, Tom Parker, & Michael Vasey, Backcountry Press, 2015, ISBN   978-1-941624-02-9, page 113.
  3. 1 2 3 4 5 6 V. Thomas Parker, Michael C. Vasey & Jon E. Keeley 2014. Arctostaphylos pilosula, in Jepson Flora Project (eds.) Jepson eFlora. accessed 15 January 2016.
  4. ↑ CNPS, Rare Plant Program. 2016. Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society, Sacramento, CA. — Arctostaphylos luciana. accessed 1.16.2016.


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