Evolvulus nuttallianus J.A. Schultes  
Family: Convolvulaceae
shaggy dwarf morning-glory,  more...
[Evolvulus argenteus Pursh,  more]
Evolvulus nuttallianus image
Max Licher  
Plant: Suffrutescent herb; stems several, erect to ascending, 10-15 cm tall, densely spreading-pilose with an indumentum of ferrugineous, brown, fulvous or gray color Leaves: linear-oblong, narrow-lanceolate to narrow-oblanceolate or rarely oblong, 8-20 mm long, 1.5-5 mm wide, entire, attenuate basally, acute to obtuse apically, densely pubescent on both surfaces; petioles short or absent INFLORESCENCE: single flowers in axils over whole length of stem; peduncles short or absent, stout Flowers: on pedicels 3-4 mm long, reflexed in fruit; bracteoles subulate, 1-4 mm long; sepals lanceolate to narrowly lanceolate, long-acuminate, 4-5 mm long, spreading-villous; corollas rotate to broadly campanulate, 8-12 mm wide, entire, purple or blue; anthers 1-2 mm long, oblong, basally auriculate, the filaments twice as long as the anthers; ovary globose Fruit: FRUITS ovoid, about as long as sepals, glabrous. SEEDS (1-)2, brown, smooth Misc: Sandy and rocky prairies and plains, chaparral, pinyon-juniper and oak woodlands; 800-2450 m (2700-8000 ft); May-Jul REFERENCES: Austin, Daniel F. 1998. J. Ariz. - Nev. Acad. Sci. Convolvulaceae 30(2): 61.
Perennial herb 10 - 20 cm tall Leaves: crowded, alternate, ascending, stalkless, small (1 - 2 cm long), lance-shaped to narrowly oblong, longer than wide, non-toothed, hairy. Flowers: many, singly in leaf axils, mostly stalkless, blue, small (around 1 cm tall and wide), broadly funnel-shaped. Sepals: five, about 0.5 cm long, narrowly lance-shaped, and covered with long soft hairs. Petals: five, but fused into short funnel with very ends flaring and appearing wavy-edged. Stamens: five, attached to inside top of petal tube. Pistil: with one, two-chambered, superior ovary; two styles, each branching in two near the base; and ending in two pairs of linear stigmas (four total, one per style branch). Fruit: two-chambered, four-valved, one- to two-seeded, egg-shaped capsules atop short, deflexed stalks. Stems: several, erect or ascending, densely hairy, and arising from a central thick root.

Similar species: Evolvulus nuttallianus is unlike other members of the Convolvulaceae family in the Chicago Region because its flowers have two styles which each branch into two and each of those branches ends in a stigma, so there are four linear stigmas per flower. In addition, other members of the family tend to be much larger with larger flowers, and much larger, obviously stalked leaves.

Flowering: June to July

Habitat and ecology: Introduced from farther south and west, this species has only been reported in one locality near a gravel pit.

Occurence in the Chicago region: non-native

Notes: This plant is native to dry prairies and barrens south of the Chicago Region from southeast Tennessee, into the Ozark region of Missouri, and west into the Dakotas and Arizona.

Author: The Field Museum

Evolvulus nuttallianus image
Max Licher  
Evolvulus nuttallianus image
Max Licher  
Evolvulus nuttallianus image
Evolvulus nuttallianus image
Kirstin Olmon  
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