Grass Inflorescence Flower Arrangement In grasses Spikelet Arrangement
- Slides: 24
Grass Inflorescence = Flower Arrangement (In grasses, Spikelet Arrangement)
Grass Inflorescence Rachis: Stalk to which Spikelets or Branches containing Spikelets Attach Peduncle: Stalk of the Inflorescence Flag Leaf: Bract of the Entire Inflorescence
Grass Inflorescence: Rachis, Primary Branch
Grass Inflorescence Rachis Primary Branch Peduncle Secondary Branch
Simple Inflorescences Bouteloua simplex: Single Inflorescence Branch
Simple Inflorescences Danthonia unispicata: Single Spikelet
Spike • Spikelets Attached Directly to Rachis • Pedicels Lacking • Branches Lacking
Spike Elymus longifolius Elymus canadensis
Raceme • Spikelets Attached Directly to Rachis via Pedicel • Branches Lacking
Panicle • Inflorescence Branched • Spikelets Attached to Branch
Open Panicle
Open Panicle Agrostis gigantea Eragrostis curvula
Contracted / Closed Panicle Muhlenbergia rigens
Contracted / Closed Panicle Setaria viridis
Contracted / Closed Panicle Dactylis glomerata
Panicle (Primary Branches are Stalked Spikes) Bouteloua curtipendula
Panicle (Primary Branches are themselves Unstalked Spikes) Bouteloua hirsuta
Panicle (Primary Branches are themselves Stalked Spikes) Leptochloa dubia https: //plants. usda. gov/gallery/large/ledu_004_lhp. jpg
Panicle (Multiple Spicate Branches arising from Points on Rachis) “Digitate” Chloris virgata
Panicle (Branches with Pairs of Stalked, Unstalked Spikelets) Rame: Branch with Pairs of Stalked, Unstalked Spikelets
Panicle (Branches with Pairs of Stalked, Unstalked Spikelets) Bothriochloa ischaemum Rame: Branch with Pairs of Stalked, Unstalked Spikelets
Panicle of Rames (Branches with Pairs of Stalked, Unstalked Spikelets) http: //hasbrouck. asu. edu/imglib/seinet/Poaceae/Bothriochloa-barbinodis-F_2. jpg Bothriochloa barbinodis Rame: Branch with Pairs of Stalked, Unstalked Spikelets
Inflorescence Terminology • • Flag Leaf • Open Panicle Peduncle • Contracted Panicle Rachis Primary Branch • Panicle of Stalked Spikes Secondary Branch • Panicle of Unstalked Spikes Raceme • Digitate Panicle Spike • Panicle of Rames Panicle
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