![oregon grape oregon grape](https://images.fineartamerica.com/images-medium-large-5/oregon-grape-jeanette-c-landstrom.jpg)
The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects. It is in leaf 12-Jan It is in flower from Feb to April. " Mahonia nervosa is an evergreen Shrub growing to 0.6 m (2ft) by 1 m (3ft 3in) at a slow rate. Characteristic of moisture-deficient sites." Often associated with Agropyron spicatum, Calamagrostis rubescens, and Rhytidiadelphus triquetrus.
![oregon grape oregon grape](https://i.pinimg.com/736x/46/7f/4f/467f4fc79cdb666db8035bd34b391014.jpg)
Sporadic in summer-dry mesothermal climates, common in open-canopy Douglas-fir forests in the coast-interior ecotone. Occurs predominantly in continental cool temperate and cool semiarid climates on very dry to moderately dry, nitrogen-medium soils its occurrence increases with increasing summer drought and continentality. "A shade-tolerant/intolerant, submontane to montane, Western North American evergreen shrub distributed more in the Cordilleran than the Pacific region.
![oregon grape oregon grape](https://c1.staticflickr.com/7/6154/6186902118_fe1d516593_b.jpg)
There are no consistent differences between the two groups other than the compound leaves, and studies suggest that the simple-leaved group is very likely polyphyletic." Ä¡. "Some authors regard the compound-leaved species as a separate genus, Mahonia. Note: Contact with filament causes stamen to snap inward, possibly to deposit pollen on pollinator."
![oregon grape oregon grape](https://lynettedartycross.files.wordpress.com/2020/08/img_1749.jpg)
Etymology: (Latin: ancient Arabic name for barberry) Toxicity: Roots often TOXIC: spines may inject fungal spores into skin. Species In Genus: +- 600 species: temperate worldwide. Fruit: berry, spheric to elliptic, generally purple-black. Flower: sepals 9 in 3 whorls of 3 petals 6 in 2 whorls of 3, bases generally glandular stamens 6 ovules 2-9, stigma +- spheric. Inflorescence: raceme, axillary or terminal. Leaf: simple or pinnately compound, cauline, alternate, generally leathery, generally persistent leaflets generally 3-11, +- round to lanceolate, generally spine-toothed. Stem: spreading to erect, branched, spiny or not, vine-like or not inner bark, wood generally bright yellow over-wintering bud scales deciduous or not. Practical ecological knowledge for the temperate reader.