Rosaceae Flashcards
Rosales characteristics
Order
- hypanthium
- toothed leaves
- micromorphology
hypanthium
a structure formed from the adnation of petals, sepal, and stamens.
Rosaceae
rose family
90/2520 worldwide
Rosaceae general plant characteristics
- herbs, shrubs, or trees (3/4 woody)
- thorns sometimes present
- ALKALOIDS ABSENT
Rosaceae general leaf characteristics
- mostly alternate and spiral
- simple to compound
- palmate or pinnate
- COMMONLY WITH GLAND-TIPPED TEETH
- stipules usually present
Rosaceae genera
- Rosa
- Prunus
- Rubus
- Potentilla
- Crataegus
Rosaceae inflorescence characteristics
various
Rosaceae flower characteristics
- USUALLY SHOWY
- bisexual (perfect)
- radial with HYPANGIUM types
- flat, cup-shaped, cylindrical
- either FREE hypangium or ADNATE to CARPELS
- NUMEROUS STAMENS (>15)
- SUPERIOR ovary
- 5 petals, 5 sepals
hypanthium types
- adnate to ovary (epigyny)
- free from ovary (perigyny)
Economically important Rosaceae
Many…
apples, pears, almonds, apricots, sweet/sour cherries, peaches, plums, black/sloe/logan/raspberries, strawberries
Malus
apples
Prunus
almond, apricot, sweet/sour cherry, peach, plum
Pyrus
Pear
Rubus
black/logan/raspberry
Fragaria
strawberry
Ornamental importance of Rosaceae
Roses - most widely cultivated flower in the world. (hybrids from ~9 species)
Rosaceae distribution and ecology
- COSMOPOLITAN
- most abundant in Northern hemisphere
- temperate forests
- salt / freshwater marshes
- arctic tundra
- roadsides
- often not deserts or tropical rainforest
Maloideae
Malus, Pyrus, Crataegus, Sorbus
- shrubs/trees, simple or compound leaves
- INFERIOR OVARY (sometimes hald inferior) FUSED WITH HYPANTHIUM
- POME fruits (apples, pears)
- 2 - 5 carpels
Amygdaloideae (=Prunoideae)
Prunus
- shrubs/trees, SIMPLE LEAVES
- SUPERIOR OVARY, not fused with hypanthium
- DRUPE fruits (plums, peaches, almonds, cherries)
- usually one carpel
Rosoideae
Rosa, Fragaria, Potentilla, Geum, Rubus
- HERBS, SHRUBS, or small temperate trees
- PINNATE or PALMATE COMPOUND LEAVES
- AGGREGATE fruits of
- ACHENES
- DRUPLETS (raspberry)
- numerous simple carpels
- SUPERIOR OVARY
- many carpels
Spiraeoideae
Spiraea, Physocarpus
- woody shrubs, simple (sometimes compound) leaves
- SUPERIOR OVARY (perigynous)
- AGGREGATE fruits
- follicles
- capsules
- 2 - 5 carpels
Alkaloids
absent in Rosaceae
poisonous, bitter-tasting
insect problems can arise from this… evolved to combat insects with other defenses
No blue roses… Why?
Rosaceae lack delphidine