Glossary

Ascending – growing upward at an angle from a somewhat horizontal base.

Clasping – leaf grows directly off the stem and appears to be grasping the stem.

Corolla – all five petals of a milkweed flower.  When these pedals open, they expose the hoods.

Elliptic – a descriptor of shape. Width is shorter compared to the length with both base and apex somewhat pointed.

Fusiform – a descriptor of shape of roots. Narrower at both ends than in the middle.

Glabrous – hairless.

Glaucous – bluish to whitish green. Often used to describe juvenile leaves with a waxy bloom or small fine hairs.

Herbaceous – not woody, soft stemmed.

Hoods – five cup-like flower structures of many milkweeds that hold nectar.

Horns – delicate spikes of floral tissue that frequently protrude from hoods on milkweed flowers.

Inflorescence – a cluster of flowers on a stem.

Pedicels – stem of a flower that is part of an umbel.

Peduncle – the stem supporting an umbel.

Petiole – stem of a leaf.

Petiolate –when a leaf is attached to a stem by a petiole.

Pollinia – sacks of pollen (2) – the saddle bags – that are part of the pollinarium, an elaborate structure that attaches to the legs of pollinators to affect pollination in milkweeds.

Ramet – a stem arising from a rhizome forming part of a clone

Rhizome – root system that spreads horizontally often giving rise to new, and genetically identical, stems (ramets) thus forming clones.

Sessile – a descriptor of leaf attachment. The leaf is directly attached to the stem.

Taproot – root system that grows vertically downward.

Tinge – tint, color present.

Umbel – type of inflorescence that has a few to >100 pedicels bearing flowers that spread from a single point or base.

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