1. 10/14/13
Diversity And Classification of
Flowering Plants:
Eudicots
Michael G. Simpson
Eudicots
• Palynological apomorphy:
tricolpate or tricolpate-derived pollen grain
1
3. 10/14/13
Diversity And Classification of
Flowering Plants:
Eudicots: Rosids
ROSIDS
• Very large, monophyletic group of Eudicots
• Linked by no clear non-molecular
apomorphies
• Ovules bitegmic (2 integuments) &
crassinucellate [contrast with Asterids]
• 13 orders
Michael G. Simpson
3
5. 10/14/13
Myrtaceae - Myrtle family
(myrtus, Gr. name for myrtle). 120 genera / 3850 species
• trees and shrubs
• with glandular-punctate or pellucid leaves
• Usually epiperigynous flowers with numerous
stamens.
K 4-5 [3,6] C 4-5 [3,6] A ∞ G (2-5) [(-16)],
inferior [rarelyhalf-inferior or superior], with
hypanthium.
Myrtaceae - Myrtle family
(myrtus, Gr. name for myrtle). 120 genera / 3850 species
Timber, oil - Eucalyptus spp.
edible fruits - Psidium guajava, guava
spices - Syzygium aromaticum, cloves,
cultivated ornamentals -Callistemon (bottlebrush),
Eucalyptus sideroxylon
5
6. 10/14/13
Leptospermum laevigatum
FABALES
Fabaceae (Leguminosae)
- Bean/Pea family
(after faba, Latin name for broad bean). 643 genera / 18,000 species
• trees, shrubs, vines, or herbs,
• stipulate, often compound leaves
• Single, unicarpellous pistil with marginal
placentation
• legume (or modified legume)
K 5 or (5) [(3-6)] C 5 or (5) [0,1-6, or (1-6)] A
10 or (10) to ∞ [variable] G 1 [2-16], superior,
hypanthium sometimes present
worldwide distribution
ecologically important for nitrogen-fixing
rhizobial nodules
pulses (e.g., beans, peas, soybeans, etc.),
fodder plants, oils, timber trees, gums,
dyes, and insecticides.
6
7. 10/14/13
Fabaceae: 3 subfamilies
Caesalpinioideae
Flowers zygomorphic; petals distinct; posterior petal inner
to laterals; stamens distinct.
Mimosoideae
Flowers actinomorphic; petals distinct or connate; stamens
often ∞, showy; flowers often densely aggregated.
Faboideae (=Papilionoideae)
Flowers zygomorphic; perianth papilionaceous; posterior
petal outer to laterals; stamens connate.
Caesalpinioideae
Flowers zygomorphic
Petals distinct
Posterior petal inner to laterals
Stamens distinct
posterior petal
inner to laterals
stamens
distinct
Bauhinia variegata Orchid Tree
Bauhinia variegata Orchid Tree
7
15. 10/14/13
pistil
unicarpellous
placentation
marginal
(l.s.)
(c.s.)
Clitoria mariana
-a resupinate papilionoid
Erythrina caffra
Euphorbiaceae - Spurge family
(after Euphorbus, physician to the king of Mauritania, 1st century).
313 genera / 8,100 species
unisexual flowers with a superior,
usually 3-carpellate ovary with 1 ovule per carpel,
apical-axile in placentation;
Crotonoideae and Euphorbioideae have a red, yellow, or
usually white (“milky”) latex
Euphorbioideae -cyathium inflorescence.
K 5 [0] C 5 [0] A 1-∞ G (3) [(2–∞)], superior.
15
20. 10/14/13
Moraceae — Mulberry family
(Latin name for mulberry). ca. 40 genera / 1100 species
monoecious or dioecious trees, shrubs, lianas, or
herbs
milky latex,
stipulate, simple leaves
fruit a multiple of achenes or syconium.
P (0-10) A 1-6 G (2) [(3)], superior or inferior.
20
21. 10/14/13
MORACEAE
• Ficus sp. – figs
• Artocarpus – “jackfruit”, “marang”,
“antipolo”
• Broussonetia “himbabao”
• Morus alba “mulberry”
Artocarpus altilis (breadfruit),
Ficus carica (edible fig),
Morus spp. (mulberry);
paper, rubber, and timber trees; and some cultivated
ornamentals, -Ficus spp., figs;
the leaves of Morus alba are the food source of silkworm
moth larvae.
21
22. 10/14/13
Rosaceae - Rose family
(Latin for various roses). 95 genera / 2,800 species
The Rosaceae are distinctive in having usually
stipulate leaves (often adnate to petiole) and an
actinomorphic, generally pentamerous flower
with hypathium present, variable in gynoecial
fusion, ovary position, and fruit type.
K 5[3-10] C 5[0,3-10] A 20-∞[1,5]
superior or inferior, hypanthium present.
G 1-∞,
ROSOIDEAE
Rosoideae
Apocarpous
Achenetum/
drupecetum
Prunoideae
Single
drupe
pistil;
superior
Maloideae
Inferior
pome
ovary
Fragaria,
Rosa
Prunus
“peach”
apple
• Carpels numerous, fruit achene or drupelet,
cyanogenic glycosides absent
• Rubus “raspberry” “blackberry”
• Rosa
• Fragaria vesca
22
26. 10/14/13
Brassicales
Glucosinolates -.
- deter herbivory and parasitism
- flavoring agents in brocolli, cauliflower, and
mustard.
Brassicaceae (Cruciferae) — Mustard family
(name used by Pliny for cabbagelike plants).
365 genera / 3250 species.
• with glucosinolates (mustard oil glucosides),
• the perianth cruciate (petals usually clawed)
Brassica oleracea - broccoli, brussels sprouts, cauliflower, cabbage,
collards, kale
rutabaga and canola oil (B. napus),
• androecium with usually 2+4, tetradynamous stamens
mustard (B. nigra),
• the gynoecium with a superior, 2- carpellate/loculate
ovary
turnip (B. rapa),
• with axile-parietal placentation
Arabidopsis thalliana
• dehiscent fruit with a replum (silique or silicle).
K 2+2 C 4 A 2+4 [2,4-16] G (2), superior.
26
28. 10/14/13
Malvaceae, s.s. - Mallow family
(name used by Pliny, meaning soft). 111 genera / 1,800 species
Malvaceae s. l.
• herbs, shrubs, or trees,
•
•
•
•
•
•
often with stellate trichomes,
typically with an epicalyx,
calyx valvate, corolla often convolute
stamens connate into tube or 5-∞ bundles
Monothecal or bithecal anthers
K 3-5 or (3-5) C 5 [3- or 0] A 5-∞ G 2-∞ [1],
superior [rarely inferior].
A.P.G.: Malvaceae, s.l.
formerly 4 families:
Malvaceae, s.s.
Bombacaceae
Sterculiaceae
Tiliaceae
28
29. 10/14/13
Economic importance includes medicinal plants;
Apomorphies of Malvaceae
Gossypium spp. (cotton, the world’s most important fiber plant)
Ceiba pentandra (kapok), in both of which the seed trichomes are
utilized,
Corchorus spp. (jute), a bast fiber plant
food and flavoring plants
- Theobroma cacao (cacao, the source of chocolate), Cola nitida
(cola), Abelmoschus (okra), and Durio zibethinus (durian);
- ornamental cultivars such as Chorisia (floss-silk tree), Hibiscus
(mallows), and Tilia (linden tree).
- Adansonia digitata (baobab, tropical Africa) - economic or
ecological importance.
Inflorescence with “bicolor unit” (after
Theobroma bicolor), consisting of a
modified, 3-bracted cyme, the trimerous
epicalyx of family members possibly
derived from these 3 bracts.
Other apomorphies:
valvate calyx
stellate or lepidote trichomes,
dilated secondary tissue rays
29