Rosaceae : Rose Family

Scientific Name:

Kingdom: Plantae

• Tracheophyta (vascular)
• Spermatophyta (seed bearing)
• Angiospermae (enclosed seeds)

Class: Dicoteldonae (two sead-leaves)

Family: Rosaceae

Genera: 12

Species: 29

Amelanchier alnifolia (Saskatoon Berry)

Chamaerhodos erecta

Dryas drummondii (Yellow Mountain Aven)

Dryas integrifolia (Entire-leaved Mountain Aven)

Dryas octopetela (Eight-petaled Mountain Aven)

Fragaria virginiana (Wild Strawberry)

Guem glaciale (Glacier Aven)

Guem macrophyllum (Large-leaved Aven)

Guem rossii (Ross's Aven)

Potentilla anserina (Common Silverweed)

Potentilla biflora (Two Flowered Cinquefoil)

Potentilla bimundorum (Branched Cinquefoil)

Potentilla elegans (Elegant Cinqufoil)

Potentilla fruiticosa (Shruby Cinquefoil)

Potentilla hyparctica (Arctic Cinquefoil)

Potentilla nivea

Potentilla norvegica (Snowy Cinquefoil)

Potentilla palustris (Marsh Five-finger)

Potentilla pensylvanica (Pensylvania Cinquefoil)

Potentilla rubricaulis (Red-stem Cinquefoil)

Potentilla uniflora (One-flowered Cinquefoil)

Rosa acicularis (Prickly Rose)

Rubus arcticus (Nagoonberry)

Rubus chamaemorus (Cloudberry)

Rubus idaeus (Wild Red Raspberry)

Sanguisorba officinalis (Great Burnet)

Sibbaldia procumbens (Sibbaldia)

Sorbus scopulina (Mountain Ash)

Spiraea beauverdiana (Spiraea)

English Name(s):

Rose Family

Description:

• Flowers regular and perfect (bisexual) (exception Rubus chamaemorus).
• Seplas 5; Petals 5; Stamens 5 to many.
• Flowers often with 5 bracts which alternate with the sepals.

Natural History:

• Many important fruits come from the rose family.
• Cosmopolitan; abundant in temperate regions.

Family Size:

World:

Genera: 100

Species: 3000

North America:

Genera: 50

Species: ?

Yukon:

Genera: 14

Species: 50

Amelanchier (Serviceberry)

World= 20 sps.

N.A.= ? sps.

Yukon= 1 sps.

Central Yukon= 1 sp.

Chamaerhodos

World= ? sps.

N.A.= ? sps.

Yukon= 1 sps.

Central Yukon= 1 sps.

Dryas (Mountain Avens)

• Low mat-forming shrubs or subshrubs.
• Branches trailing and freely rooting.
• Leaves alternate, simple, leathery, petioled (stalked), margins crenate or entire (smooth), dark green above and white tomentos (Wooly) below.
• Flowers scapose (on leafless stalk), normally solitary; Sepals and petals 8-10; Petals white or yellow; Stamens (male parts) and pistiles (female) numerous.
• Fruit a dry achene.
• In fruit the style becomes much elongated and plumose (with long feather like hears).
• Habitat calciferous
• Some hybridization reported.

World= ? sps.

N.A.= ? sps.

Yukon= 4 sps.

Central Yukon= 3 sps.

Fragaria (Strawberry)

• info

World= 20+ sps.

N.A.= 8 sps.

Yukon= 1 sps.

Central Yukon= 1 sps.

Guem (Avens)

• Perennial, herbacious, from stout, thick, sublignous(almost woody), rhizomes (underground stems).
• Leaves mostly basal (from base), some cauline (on stem), Odd-Pinnate.
• Flowers solotary or in few flowered cymes.
• Sepals 5, alternating with small, sepal-like bract; Petals 5, yellow; Stamens(male parts) numerous; Pistils (female parts) numerous on a dry conical recepticle; Style one per pistile persistent.
• Fruit are, small, dry, seed-like achenes on dry cone-shapes recepticle.

World= 56 sps.

N.A.= 18 sps.

Yukon= 5 sps.

Central Yukon= 3 sps.

Potentilla (Cinquefoil)

• Annual or perennial herbacious, (or woody in P.fruiticosa).
• Leaves basal or alternate on stem. Ternately, palmately, or pinnately compound (of more than one blade). often persistent (withering but not falling off).
• Flowers 5-parted, solitary or in cymes.
• Sepals 5 alternating with bractlets; Petals 5 yellow; Stamens (male parts) 10-30; Pistils (female parts) numerous; Style one per pistil decidous (falling off).
• Fruit are small, seed-like, dry achenes on a dry hemispherical recepticle.

World= 300 sps.

N.A.= 120 sps.

Yukon= 23 sps.

Central Yukon= 12 sps.

Rosa (Rose)

• Shrubs usually with prickly or thorny stems.
• Leaves odd-pinnate; Stipules(leaf-like appendages) prominent and fused to petiole (leaf stalk).
• Flowers showy up to 5 cm in diameter; Petals 5, pink; Sepals 5.
• Fruit fleashy, sherical or oblong, at first green ripening to red or reddish orange.

World= 100 sps.

N.A.= ? sps.

Yukon= 2 sps.

Central Yukon= 1 sps.

Rubus (Bramble)

• Shruby tufted or trailing perennials.
• Leaves ternately or pinnately compound or simple and 3-lobed.
• Flowers solitary or in cymes.
• Sepals 5 persistent; Petals 5; Stamens (male parts) numerous; linear to club-shaped. Pistils (female parts) numerous.
• Fruit are tiny drupelets in clusters around enlarged recepticals.

World= 700 sps.

N.A.= ? sps.

Yukon= 5 sps.

Central Yukon= 3 sps.

Sanguisorba (Burnet)

• Glabrous (smooth), herbacious plants. Arising from a stout perennial base.
• Leaves pinnate, margins coarsely-dentate, Stem leaves smaller, alternate.
• FLowers small and perfect (bisexual) in a dense long-peduncled (stalked) spike.
• Sepals 4 petal-like; Petals absent.
• Fruit a dry achene.

World= 30 sps.

N.A.= 8 sps.

Yukon= 2 sps.

Central Yukon= 1 sps.

Sibbaldia

World= ? sps.

N.A.= 1 sps.

Yukon= 1 sps.

Central Yukon= 1 sps.

Sorbus (Mountain Ash)

• Shrubs or small trees.
• Leaves alternate, pinnate with mant leaflets.
• FLowers in a corybose cyme.
• Sepals 5, persistent; Petals 5, white to cream; Stamens (male parts) 15-20; Pistil female parts 1, ovary inferior (within flower base) with 2-5 locules (chambers) with one style per locule.
• Fruit a pome.

World= 100 sps.

N.A.= ? sps.

Yukon= 2 sps.

Central Yukon= 1 sps.

Spiraea

World= 100 sps.

N.A.= ? sps.

Yukon= 1 sps.

Central Yukon= 1 sps.