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Contura Creek sandmat, Contura Creek spurge, valley spurge

Habit Herbs, annual, with taproot.
Stems

prostrate, 10–35 cm, glabrous or pilose.

Leaves

opposite;

stipules distinct, subulate, 0.5–1.6 mm, glabrous or pilose;

petiole 0.3–2 mm, glabrous or pilose;

blade ovate to deltate or falcate, 2.3–13 × 1.5–6 mm, base asymmetric, usually cordate, rarely rounded, margins occasionally reddish, entire, often revolute, apex acute to obtuse, occasionally mucronate, surfaces glabrous or pilose;

midvein conspicuous, lateral veins frequently visible abaxially.

Involucre

campanulate, 1–2.5 × 1.3–2.4 mm, glabrous or pilose;

glands 4, yellow becoming deep red, elliptic or oblong to orbiculate, 0.4–0.6 × 0.5–0.7 mm;

appendages absent or whitish, orbiculate, 0.1–0.2 × 0.3–0.5 mm, distal margin entire.

Staminate flowers

30–70.

Pistillate flowers

ovary glabrous or pilose;

styles 0.4–0.5 mm, 2-fid at apex.

Capsules

subglobose to broadly ovoid, 1.4–2.7 × 1.9–3.1 mm, glabrous or pilose;

columella 1.4–2 mm.

Seeds

whitish gray to black, ovoid to oblong, terete to bluntly subangled in cross section, 1.1–1.7 × 0.8–1.3 mm, rugose or smooth.

Cyathia

solitary at distal nodes;

peduncle 0.9–2.2 mm.

Euphorbia ocellata

Distribution
from FNA
AZ; CA; ID; NV; UT
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Stems, leaves, ovaries, and capsules glabrous; involucral gland appendages absent.
subsp. ocellata
1. Stems, leaves, ovaries, and capsules pilose; involucral gland appendages present.
subsp. rattanii
Source FNA vol. 12, p. 279.
Parent taxa Euphorbiaceae > Euphorbia > sect. Anisophyllum
Sibling taxa
E. aaron-rossii, E. abramsiana, E. acuta, E. agraria, E. albomarginata, E. alta, E. angusta, E. antisyphilitica, E. arizonica, E. astyla, E. austrotexana, E. bicolor, E. bifurcata, E. bilobata, E. blodgettii, E. bombensis, E. brachycera, E. capitellata, E. carunculata, E. chaetocalyx, E. chamaesula, E. cinerascens, E. commutata, E. conferta, E. cordifolia, E. corollata, E. crenulata, E. cumulicola, E. cuphosperma, E. curtisii, E. cyathophora, E. cyparissias, E. davidii, E. deltoidea, E. dendroides, E. dentata, E. discoidalis, E. eriantha, E. exigua, E. exserta, E. exstipulata, E. falcata, E. fendleri, E. florida, E. floridana, E. garberi, E. georgiana, E. geyeri, E. glyptosperma, E. golondrina, E. gracillima, E. graminea, E. helioscopia, E. helleri, E. heterophylla, E. hexagona, E. hirta, E. hooveri, E. humistrata, E. hypericifolia, E. hyssopifolia, E. indivisa, E. innocua, E. inundata, E. ipecacuanhae, E. jaegeri, E. jejuna, E. laredana, E. lasiocarpa, E. lata, E. lathyris, E. longicruris, E. lurida, E. macropus, E. maculata, E. marginata, E. meganaesos, E. melanadenia, E. mendezii, E. mercurialina, E. mesembrianthemifolia, E. micromera, E. misera, E. missurica, E. myrsinites, E. nephradenia, E. nutans, E. oblongata, E. ophthalmica, E. ouachitana, E. parishii, E. parryi, E. pediculifera, E. peplidion, E. peplus, E. perennans, E. pergamena, E. pinetorum, E. platyphyllos, E. platysperma, E. polycarpa, E. polygonifolia, E. polyphylla, E. porteriana, E. prostrata, E. pubentissima, E. purpurea, E. radians, E. rayturneri, E. revoluta, E. roemeriana, E. rosescens, E. schizoloba, E. serpens, E. serpillifolia, E. serrata, E. serrula, E. setiloba, E. simulans, E. spathulata, E. stictospora, E. strictior, E. telephioides, E. terracina, E. tetrapora, E. texana, E. theriaca, E. thymifolia, E. tithymaloides, E. trachysperma, E. trichotoma, E. vallis-mortae, E. velleriflora, E. vermiculata, E. villifera, E. virgata, E. wrightii, E. yaquiana
Subordinate taxa
E. ocellata subsp. ocellata, E. ocellata subsp. rattanii
Synonyms Chamaesyce ocellata
Name authority Durand & Hilgard: Pl. Heermann., 46. (1854)
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