Agave utahensis Engelm.
Family: Asparagaceae
Utah agave
Agave utahensis image
Zoya Akulova  
Plants acaulescent, suckering or not; rosettes solitary or sparingly cespitose, 1.5-6 × 1.5-10 dm. Leaves ascending, 12-50 × 1-5.5 cm; blade grayish green to yellowish green or green, without bud-prints, linear-lanceolate or lanceolate, stiff, adaxially plane or concave toward apex, abaxially convex toward base; margins straight or undulate, nonfiliferous, conspicuously armed, horny from distalmost teeth to apical spine, teeth single, 2-12(-15) mm, 1-4 cm apart, rarely absent; apical spine light gray to ivory white, acicular or subulate, 2-20 cm. Scape 1.7-5 m. Inflorescences spicate, racemose or narrowly paniculate, open to densely flowered; bracts caducous, narrowly triangular, 4-8 cm; lateral branches 50+, horizontal to slightly ascending, comprising distal 1/2-2/3 of inflorescence, shorter than 10 cm. Flowers 2-12 per cluster, erect, urceolate, 2.3-4.3 cm; perianth yellow, tube campanulate, 1-4 × 6.5-11.5 mm, limb lobes connivent, erect, subequal, 7-12 mm; stamens slightly exserted; filaments inserted at or 1-3 mm above base of perianth tube, erect, white, 1.3-2.4 cm; anthers pale yellow, 5-12 mm; ovary 1.2-2.9 cm, neck constricted, 3.5-8.5(-10) mm. Capsules pedicellate, oblong to ovoid, 1-2.5 cm, apex beaked. Seeds 2-4 mm.
Plant: perennial scapose herb; Rosettes 15-60 cm high, 20-100 cm broad, open to dense and compact, single to caespitose Leaves: several to numerous, 12-50 cm long, 2.5-5.5 cm wide, linear-lanceolate to lanceolate, attenuate to long-attenuate, stiff, straight, falcate, or upcurving, planar to concave towards apex, convex below, yellow-green, green, or bluish-gray glaucous, the margins straight; teeth 2-5 mm long, 1-4 cm apart, blunt, thick, light gray to white, with conspicuous brown ring at base, friable, or rarely absent; interstitial teeth absent; terminal spine 2-20 cm long, subulate, decurrent to upper teeth, openly grooved above, light gray or white INFLORESCENCE: scape 1.5-5 m tall, spicate, racemose, or narrowly paniculate, with several to numerous conspicuously flattened lateral branchlets up to 10 cm long in upper ½ of flowering stalk, the stalk slender to thickish, green Flowers: in clusters of 2-12, 23-43 mm long, urceolate, fragrance not discernable; tepals subequal, 7-12 mm long, 3-5(-7) mm wide, linear, conduplicate, the outer ones strongly overlapping the inner ones, all persistently erect, connivent, strongly clasping the filaments, deep yellow; filaments 13-24 mm long, inserted at base of tube or 1-3 mm above the base, white, the anthers 5-12 mm long, deep yellow, aging yellowish-orange; ovary 12.5-29 mm long with a constricted neck 3.5-8.5(-10) mm long, yellowish-green to chartreuse-green, the style 18-21 mm long when stigma is receptive, white; floral tube 1-4 mm high, 6.5-11.5 mm wide, bulging at tepal bases, urceolate, yellowish-green to charteuse-green Fruit: capsules, ovoid to oblong, 1-2.5 cm long, 1-1.5 cm broad, short-beaked; SEEDS 2-4 mm long, 3-4 mm wide, thick REFERENCES: Hodgson, Wendy. 1999. Agavaceae. Ariz. - Nev. Acad. Sci. 32(1).
Common Name: Utah agave Duration: Perennial Nativity: Native Lifeform: Succulent Wetland Status: None General: Perennial scapose succulents; plants acaulescent; rosetted solitary or sparsely clustered, 15-60 cm tall, 15-100 cm wide; roots fibrous, thick. Leaves: Basal, forming a rosette, ascending, narrowly lanceolate, 10-50 cm long, 1-6.5 cm wide, green, yellowish green, or glaucous, flat or concave above towards the tip, convex below towards the base, margins straight or wavy, bearing distinct teeth 2-12 mm long, 1-4 cm apart, apex spine- tipped, the spine awl- to needle-shaped, 2-20 cm long. Flowers: Inflorescence a panicle, open to dense, with 27-48 flowers borne in umbel-like clusters; flowering stalk 2-6 m tall; bracts of the inflorescence triangular, 3-10 cm long, persistent; flowers pink, red, or orange in bud, yellow to yellowish green at time of flowering; perianth campanulate, 6-18 mm long; tepals 6, fused at the base; stamens 6, long-exserted; flowers June-August. Fruits: Loculicidal capsule, oblong to ovoid, 1-2.5 cm long, pedicellate, apex beaked; seeds obovoid, 2-4 mm long, flattened, becoming round, black. Ecology: Dry slopes, mesas, hillsides; 900-2300 m (3000-7500 ft); Mohave and Coconino counties; southwestern U.S. Notes: Agave utahensis is a host plant for the Mojave giant skipper butterfly. The Havasupai make brushes and brooms from this species, and the Navajo use the fibers to make blankets.
Agave utahensis image
Gregory Gust  
Agave utahensis image
Gregory Gust  
Agave utahensis image
Gregory Gust  
Agave utahensis image
Zoya Akulova  
Agave utahensis image
Zoya Akulova  
Agave utahensis image
Zoya Akulova  
Agave utahensis image
Zoya Akulova