Fruits Seed: Ovule and its Contents Testa (Seed Coat) = Ovule Wall Embryo, Endosperm Fruit: Ovary and anything attached to it Pericarp = Ovary Wall with three layers, Exocarp, Mesocarp, Endocarp Seed(s)

Ovaries from Fused Carpels septate nonseptate axial parietal 3 Carpellate 3 Loculate 3 Septa 3 Carpellate 1 Loculate 0 Septa basal marginal axial parietal free central Walters and Keil marginal axial parietal free central apical

A Taxonomy of Fruits 1a. From a Single Ovary 2a. Dry 3a. Indehiscent 4a. One Single-Ovuled Carpel 5a. Testa and Pericarp Not Fused Achene [Rosaceae]: Persistent Funiculus 4b. Two (Three) Single-Ovuled Fused Carpels, One Locule, One Seed 6a. Testa and Pericarp Not Fused 7a. Thin, Flexus Pericarp Cypsella [Asteraceae only]: Persistent Funiculus, Persistent Sepals. Often called an Achene. Sunflower Samara [Ulmaceae]: Winged Pericarp. Maple, Ash, Elm 7b. Thick, Hard Pericarp Nut [Fagaceae, Polygonacae]: Oak 6b. Testa and Pericarp Fused 8a. Thin, Flexus Pericarp Caryopsis [Poaceae]: Often called a Grain. Corn, Wheat 8b. Thick, Hard Pericarp Nutlet (First Sense) [Cyperaceae]

2a. Dry (Continued) 3b. Dehiscent 9a. Single Carpel, One-Many Seeded 10a. One Line of Dehiscence (One Valve) Follicle [Asclepiaceae]: Milkweed 10b. Two Lines of Dehiscence (Two Valves) Legume [Fabaceae only]: Peanut, Pea 9b. Several Fused Carpels, Many Seed Capsule: Okra, Poppy 9c. Two Fused, Many Seeded, Carpels with Modification Silique/Silicle [Brassicaceae only]: 2b. Fleshy 11a. Flesh from Pericarp 12a. Entire Pericarp Fleshy Berry: Tomato 12b. Thick Exocarp, Fleshy Mesocarp and Endocarp Pepo [Cucurbitaceae]: Cucumber, Pumpkin Hesperidium [Rutaceae]: Orange 12c. Hard or Leathery Endocarp Drupe: Cherry, Avocodo, Coconut

2b. Fleshy (Continued) 11b. Accessory Fruits 12a. Flesh from Hypanthium Pome [Rosaceae]: Apple, Pear 12b. Flesh from Receptacle (in Aggregate Fruits) Expansion of the Axis: Strawberry Envelopment by the Axis, Pseudocarp: Sweetshrub, Papaw 12d. Flesh from Sepals Mullberry (a Multiple Fruit) 11c. Flesh from Inflorescence Axis (in Multiple Fruits) Expansion of the Axis: Pineapple Envelopment by the Axis, Synconium: Fig 1b. Several Transiently Fused Carpels Schizocarp: Single-Ovuled Carpels, Splitting apart at Maturity Nutlet (Second Sense): Two-Ovules per Carpel, Two Carpels, Each Ovule in its own compartment. [Lamiaceae, Verbenaceae] 1c. From Several Unfused Carpels (Aggregate Fruits) Magnolia, Strawberry 1d. From Several Flowers (Multiple Fruits) Pineapple, Ear of Corn

Single-Seeded, Dry Fruits: Achene Single-Ovuled, Single Carpellate Ovary Achene: Testa attached to Pericarp only via Persistent Funiculus Utricle: An Achene with the Pericarp inflated away from the Testa Sometimes used to describe an inflated fruit of other types

Single-Seeded, Dry Fruits: Achene-like Single Ovule per Carpel, Two Carpellate Ovary, One Ovule Develops Cypasella: Achene-like with Adnate Calyx (Pappus) [Asteraceae Only: Sunflower] Samara: Achene-like with Winged Pericarp [Ulmaceae: Elm, Maple, Ash]

Single-Seeded, Dry Fruits: Achene-like Involucre (bracts) Single Ovule per Carpel, Two-Carpellate Ovary, One Ovule Develops Nut: Hard Pericarp [Fagaceae: Oak]

Single-Seeded, Dry Fruits: Caryopsis or Grain Single Ovule per Carpel, Two-Carpellate Ovary, One Ovule Develops Pericarp Testa Endosperm Embryo Caryopsis or Grain, Testa completely Fused to Pericarp, both Thin [Poaceae Only: Corn, Wheat] Nutlet (First Sense), Testa completely Fused to the Pericarp; Pericarp Thick [Cyperaceae] Often used to describe small nut-like fruits

Dehiscent, Dry Fruits: Follicle Multi-Ovuled (usually), Single Carpellate Ovary; Dispersal Unit is a Seed Follicle: Single Carpellate, Dehiscing along One Suture [Asclepiaceae: Milkweed]

Dehiscent, Dry Fruits: Legume Breaks into Single-Seeded Segments Loment Tardily Dehiscent Along One Suture Multi-Ovuled (usually), Single Carpellate Ovary; Dispersal Unit is a Seed Legume: Single Carpellate, Dehiscing along Two Sutures [Fabaceae Only: Peanut, Pea]

Dehiscent, Dry Fruits: Capsule and Silicle/Silique Multi-Seeded, Syncarpellate Ovaries; Dispersal Unit is a Seed Denticidal Schizocarpic Septicidal Loculicidal Poricidal Circumscissile Silicle Silique Along both sides of Partition (Replum) [Brassicaceae Only] Capsules: Syncarpellate, dehiscing through, between, or above Carpels

Flesh from Various Tissues Fleshy Fruits Flesh from Various Tissues Hesperidium Mesocarp and Endocarp Exocarp Oily and a Rind [Rutaceae Only: Orange] Hypanthium Mesocarp Endocarp attached to Seed = Pyrene, Pit Mesocarp and Endocarp Exocarp a Rind [Cucurbitaceae: Cucumber] Entire Pericarp

Aggregate Fruits Multiple Fruits Achenes surrounded by Sepals Mulberry Drupelets Raspberry Achenes Rose Follicles Magnolia Syconium Fig Achenes Strawberry Single Flower with Aggregate of Unfused Carpels on its Receptacle, or Multiple Flowers on a Spath-or Head-like Receptacle

Single Ovule per Carpel, Transiently Fused Carpels: Schizocarps Samaroid Schizocarp (tardily separating) Schizocarp: Single Ovule per Carpel, Fused Carpels that break apart at Maturity Carpels usually called Mericarps; can be Achenes, Drupes, etc.

Single Seeded Dry Fruits: Nutlet (Second Sense) Sepals Nutlet: ‘Mericarp’ from a Two Ovule per Carpel, Two-Carpellate, Ovary Develops as 4 Transiently Fused Compartments Not a true Schizocarp producing true Mericarps [Lamiaceae, Verbenaceae] Nutlets often used to describe any small Nut-like Fruits

Rosales Rosaceae Rose Family Malus pumilla, Domesticated Apple Fused Hypanthium; Fruit a Fleshy Pome

Rosales Rosaceae Rose Family Malus pumilla, Domesticated Apple Fleshy Hypanthium Persistent Sepals Longitudinal Section Transverse Section 5-Carpellate, 5 Loculate Ovary Most Cultivars are Genetic Mosaics: Seed is wild-type and Flesh is Mutant. Propagated by grafting shoots onto wild-type rootstock.

Rosales Rosaceae Rose Family Malus pumilla, Domesticated Apple Three tissue layers in plants: L-I epidermis; L-II subepidermal; L-III middle, central These rarely mix except in thin structures such as leaf blades Both Hypanthium and Ovary each have their own L-I, L-II, and L-III Ovary: L-II Gametophytes and thus Seed in the Apple Fruit (wildtype) Hypanthium: L-I Color of Apple Fruit (mutant) L-II Insignificant L-III Flesh of Apple Fruit (mutant)

Rosales Rosaceae Rose Family Malus pumilla, Domesticated Apple John Chapman (Johnny Appleseed): 1774 - 1845 Missionary for his own religion; Sold seed and seedlings of cider apples throughout the Northwest Territory. Northwest Ordinance required a land-grantee to plant at least 50 apple or pear trees.These were not eating apples, but “sour enough to set a squirrel's teeth on edge and make a jay scream” (Thoreau), used only for hard cider. Before refrigeration, store carbohydrate as alchohol. Carry Nation’s axe was for apple trees as well as bar-rooms. Cider also declined because of Beer Industry by German immigrants. Read Michael Pollan, The Botany of Desire: A Plant’s-eye View of the World Apples, Tulips, Marijuana and Potatos