Adam's Needle Yucca filamentosa Last Name: Needle, Adam's
A tall stout stem rising from a rosette of rigid, sword-like leaves and bearing a loose cluster of white, nodding, bellshaped flowers well above foliage. Leaves: To 2 1/2"(75 cm) long, 2 1/2"(6.5 cm) ... read more
Adobe Lily Fritillaria pluriflora Last Name: Lily, Adobe
1-7 nodding, pinkish-lavender, bell-shaped flowers in an open raceme above leaves.Leaves: To 5" (12.5 cm) long, narrowly lanceolate, clustered near base.Height: 1-18" (2.5-45 cm).... read more
African Rue Peganum harmala Last Name: Rue, African
Introduced. A very bushy, succulent, bright green plant, highly branched and often wider than tall, with numerous needle-like leaflets and small, white, 5-petaled flowers.Leaves: alternate, 3/4-2" (2-... read more
Agrimony Agrimonia gryposepala Last Name: Agrimony
An erect, wand-like cluster of small yellow flowers extending above pinnately compound leaves; stem exudes spicy odor when crushed. Leaves: 5-9, each with leaflets 2-4" (5-10 cm) long, bright green, ... read more
1 or few stems, leafy near base, with pale green, bilaterally symmetrical flowers in long, slender, open racemes. Leaves: To 10" (25 cm) long, lanceolate. Height: 8-31" (20-80 cm).... read more
Aleutian Violet Viola langsdorfii Last Name: Violet, Aleutian
A 2-5 in. tall violet with rounded, heart-shaped leaves; the basal ones have petioles as long as 8 in. Large, lavender flowers have petals flushed with white but yellow at the base. The lower, later... read more
Introduced; can be invasive. Cluster of flowers on low or prostrate stems.Leaves: clover-like, divided in 3s.Height: 18-36" (45-90 cm).... read more
Alligator-flag Thalia geniculata Last Name: Alligator-flag
Tall perennial herb with long basal leaves and pairs of small flowers in open panicles.Leaves: large, broad, lanceolate, arising from underground rhizomes; each blade to 20" (50 cm) long.Tall perennia... read more
Alligator-lily Hymenocallis palmeri Last Name: Alligator-lily
A Florida native wildflower bearing single, spidery, fragrant blooms. Leaves: long, linear, strap-like. Height: 18" (45 cm).... read more
Alligatorweed Alternanthera philoxeroides Last Name: Alligatorweed
Introduced. A usually aquatic plant that forms mats and is considered a noxious weed in the United States.Leaves: opposite; lance-shaped to elliptical; to 2 3/4" (7 cm) long.Height: to 5' (1.5 m).... read more
A variable, tufted plant with a rosette of lance-shaped leaves and a single, slender stem rising 4-12 in. and bearing a large, single flower with toothed, yellow petals and yellow disks. Sometimes tw... read more
Alpine Aster Oreostemma alpigenum var. haydenii (Aster alpigenus var. haydenii) Last Name: Aster, Alpine
A small, colorful aster of the mountains.Leaves: linear, smooth, mostly basal.Height: 5" (12.5 cm).... read more
Alpine Azalea Kalmia procumbens Last Name: Azalea, Alpine
A creeping, much-branched, matforming, dwarf shrub with 2-5 pink, bell-shaped flowers in terminal clusters and evergreen leaves with rolled edges. Leaves: About 3/8"(8 mm) long, leathery, elliptical, ... read more
Alpine Besseya Besseya alpina Last Name: Besseya, Alpine
A small pale plant, woolly in younger parts, bearing pale bluish-violet flowers in dense spikes with conspicuous bracts. Leaves: 3/4-2" (2-5 cm) long, mostly at base, blades broadly ovate, edges scall... read more
Alpine Collomia Collomia debilis Last Name: Collomia, Alpine
Numerous sprawling stems forming a loose mat, with leaves and cream, white, pink, lavender, or blue flowers crowded at ends. Leaves: 1/2-1 1/4" (1.5-3 cm) long, varying from lanceolate to deeply divid... read more
Alpine Forget-me-not Eritrichium nanum (Eritrichium aretioides) Last Name: Forget-me-not, Alpine
A low, cushion-like plant with deep blue flowers just above the tufted leaves. Leaves: up to 1/2" (1.3 cm) long, lanceolate, covered with loose hairs. Height: to 4" (10 cm).... read more
