Glossary: U
- umbel
- An indeterminate inflorescence that has a greatly reduced central axis, such that the flowers appear to originate from the same point, usually resulting in a flat- or round-topped inflorescence, with a sequence of flowering from outside to inside.
-
umbellet
- A small umbel.
-
umbo
- A raised portion on the visible part of a scale of a seed cone.
- umbraculiform
- The shape of a corolla (or other structure) that has a basal tube and expands to become circular or nearly circular in outline distally with curved-ascending segments so that a convex area exists inside the corolla segments; umbrella-shaped.
- unarmed
- Without spines, prickles or thorns.
-
uncinate
- Hooked at the tip (as in a hair).
-
undulate
- Wavy-margined but without prominent teeth.
-
unisexual
- A flower that bears only carpels or stamens.
- unrankable
- Status is not known due to lack of information or conflicting information.
- unranked
- Status is not yet assessed.
- UPL
- Obligate Upland: plant may occur in wetlands outside of New England, but occurs almost always in non-wetlands in New England (probability > 99%).
-
urceolate
- Urn-shaped and constricted just below the apex, such as a blueberry flower.
-
utricle
- A specialize type of achene that is a small, thin-walled, one-seeded fruit in which the outer mature layer (pericarp) is inflated or easily separable from the seed.
