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Euphorbia spathulata  Lam.
Konza Prairie, Riley County, Kansas
Usually annual, rarely biennial
Height: 4-28 inches
Family: Euphorbiaceae - Spurge Family
Flowering Period:   May, June, July, August, September
Stems: Ascending to erect, simple or branched, glabrous; not rooting at nodes.
Leaves: Alternate; stipules absent; petiole absent; blade oblanceolate to oblong or spatulate, .4 to 2 inches long, .25 to .4 inch wide, base symmetric, subcordate to rounded or attenuate, sometimes clasping, margins finely toothed, tip rounded to obtuse or retuse, surfaces glabrous.
Inflorescences: Cyathia, terminal, peduncle .01 to .06 inch.
Flowers: Involucres campanulate, 0.2 to 0.6 x 0.3 to 0.5 inch, glabrous; glands 4 to 5, greenish, elliptic to obong or reniform; appendage absent. Staminate flowers 3-10, sepals 0; petals 0; stamen 1. Pistillate flower: ovary glabrous; styles cleft in two parts for 1/2--1/4 their lengths.
Fruits: Capsules depressed-globose, 3-lobed, .08 to .14 inch, glabrous, warty near apex and along lobes; seeds reddish brown to dark purple, ovoid to globose, .05 to .09 inch, smooth to reticulate or ridged.
Habitat: Rocky or sandy tallgrass and mixed-grass prairies.
Distribution: Principally east 2/3 but also scattered occurance in west of Kansas.
Origin: Native
Comments: For Euphorbus, 1st century Greek physcian. Euphorbia is among the largest genera of flowering plants.

Warty spurge
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Konza Prairie, Riley County, Kansas
Warty spurge
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Konza Prairie, Riley County, Kansas