Lecture Notes3

463 438 complete flower with all 4 series incomplete

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Unformatted text preview: a separate pistil. distinct, Syncarpous: 2 or more carpels fused into a compound pistil Carpels (pistils) Calyx Carpel (pistil) Petal Single carpel of Tephrosia, a monocarpous Legume Stamens Numerous distinct carpels of Magnolia Style Ovary Compound pistil of Euphorbia Carpel Fusion Reviewed Apocarpous Monocarpous Carpel Stamens Syncarpous Pistil (composed of multiple carpels) Stamens Cross section Presence / Absence of Flower Parts: p. 463; 438) Complete: Flower with all 4 series Incomplete: Flower missing one or more series. Perfect: Flower with both stamens and carpels. Imperfect: Flower lacking either stamens or carpels. Staminate: Male flower with stamens, but lacking functional carpels. Pistilate: Female flower lacking functional stamens. Examples: Presence / Absence of Floral Parts: Staminate flowers Corolla Pistilate Pistil (stigma) flower Stamens bract Calyx Complete flower of Campsis Pistil Incomplete, perfect grass flower Imperfect flowers of Carex Types of Plants with Imperfect Flowers: (P. 463; 438) Monoecious: Same Plant bears both staminate and pistilate and flowers. flowers. Dioecious: Individual plants bear either staminate or either or pistilate flowers, but not both. Spikelet of staminate flowers Carex lupulina: a monoecious plant Spikelet of pistilate flowers Inflorescence (p. 460-462; 436-438): Arrangement of Flowers on a Plant Peduncle: stalk of entire inflorescence/ solitary flower. Pedicel: stalk of a single flower. Rachis: central axis of some inflorescences. Bracts: modified leaves that subtend (attach beneath) flowers and/or inflorescence. Bract Rachis Peduncle Pedicel Bract Inflorescence Types: Solitary flower. Flower Peduncle Inflorescence Types: Spike: Elongate, flowers sessile on rachis Elongate, Flowers Rachis Peduncle Inflorescence Types: Spikelet: Miniature, compacted spike (grasses & sedges) Spikelets Bracts & flowers Grass Spikelets (Bromus) Spikelets of (Carex, Cyperaceae) Inflorescence Types: Raceme: Flowers attach to rachis via pedicel. Flowers Rachis Pedicel Peduncle Inflorescence Types: Panicle: branches of multiple flowers attach to rachis. Panicle: Flowers Pedicel branch Peduncle Inflorescence Types: Umbel (and Compound umbel): All pedicels attach to a Compound ): single point. Characteristic of carrot family (Apiaceae). single Flowers Pedicel bracts Peduncle Simple umbel Compound umbel of Torilis arvensis Inflorescence Types: Head: All flowers sessile near a single point. Characteristic of sunflower family (Asteraceae). Characteristic Flowers Bracts Peduncle Inflorescence Types: Cyme: A determinate inflorescence: Inner/upper flowers mature first. Several subtypes. mature Oldest Flowers Younger flowers Peduncle Cyme of bullnettle (Cnidoscolus texanus) Fruit: Mature Ovary (p. 492-496; 466-470)* Carpels enclosing ovules mature into fruits enclosing Carpels seeds. seeds. Only flowering plants. Fruit (mature carpels) Seed (mature Ovule) Embryo * Fruits are covered in Ch. 20 Placentation (p. 463; 439-440)...
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This document was uploaded on 03/28/2014 for the course BIO 131 at SFASU.

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