Adonis aestivalis L.

Summer Pheasant's Eye

Agave utahensis Engelm.

Utah Agave

Ageratum conyzoides L.

Tropical Whiteweed

Andropogon ternarius Michx.

Paintbrush Bluestem, Silver Bluestem, Split Bluestem, Splitbeard Bluestem

Apium graveolens L.

Wild Celery

Aralia cordata Thunb.

Udo

Argemone glauca (Nutt. ex Prain) Pope

Hawaiian Poppy, Smooth Pricklypoppy

Argemone mexicana L.

Mexican Pricklypoppy

Arthropodium cirrhatum (G. Forst.) R. Br.

Renga lily, Rock-lily

Arum italicum Mill.

Cuckoo's Pint, Italian Arum, Italian Lords And Ladies

Asclepias cordifolia (Benth.) Jeps.

Heartleaf Milkweed

Asclepias physocarpa (E. Mey.) Schltr.

Balloonplant

Asclepias speciosa Torr.

Showy Milkweed

Avena sativa L.

Common Oat

Bergenia crassifolia (L.) Fritsch

Siberian-tea

Callistephus chinensis (L.) Nees

China Aster

Camassia leichtlinii (Baker) S. Watson

Large Camas

Campanula rotundifolia L.

Bluebell Bellflower, Common Harebell