Plant Image
Willow Dells Tr - Sue Smith

Yavapai County Native & Naturalized Plants

Lappula occidentalis - flatspine stickseed

Synonyms: Lappula redowskii, Lappula texana, Echinospermum redowskii var. occidentalis
Other Common Names: white stickseed, western stickseed
Plant Form: Forb

Family: Boraginaceae

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Willow Dells Tr
Sue Smith
Willow Dells Tr
Sue Smith
Plant - summer
Willow Dells Tr
Sue Smith
Forb Plant Description

Origin: Native   Life Cycle: Annual   Similar Species: Lappula occidentalis var. cupulata
General Desc: Stems simple or slightly branched above the middle of the stems; erect to loosely spreading, grayish to whitish; taproot.
Identification notes: Annual, erect hairy stems branch above the middle. Flowers white to pale blue, inconspicuous and tiny on elongated stems, each subtended by a leaf-like bract; stigmas capitate (head-like). Flower stems erect in fruit; fruit margins barbed.
Height: 6 to 24 inches


Habitat Description: Sunny, usually disturbed areas, roadsides, overgrazed areas.
Plant Communities: Disturbed Areas
Elevation: Below 8500 feet

Flower Characteristics

Color: Blue, white, yellowish-white     Shape: Regular in elongated clusters     Tubular: Y     Flowering Period: Mar - Sep
Description: Flower heads of several elongated leafy stems with short branches bearing flowers; flowers are 1/8 to 1/4 inch long, each subtended by a leaf-like bract.

Leaf and Stem Characteristics

Leaf Color: Green     Leaf Type: Simple     Leaf Shape: Narrow     Leaf Margin: Smooth     Leaf Attachment: Alternate     Leaves Clasp: N
Hairs: Leaves and stems     Spines: N
Leaf Description: Greenish-white in appearance because of hairy leaves and stems.

Fruit and Seed Characteristics

Fruit Color: Brown   
Fruit Type: Nutlet
Fruit Notes: 4 nutlets, approximately 1/8 inch long with single row of barbed prickles on margin.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 7.0  
Last Updated: May 10, 2017  
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