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Pine shaded understory in fallow, weedy pasture on low hillside in tuffaceous rhyolite gravels
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Pine shaded understory in fallow, weedy pasture on low hillside in tuffaceous rhyolite gravels
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Pine shaded understory in fallow, weedy pasture on low hillside in tuffaceous rhyolite gravels
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Pine shaded understory in fallow, weedy pasture on low hillside in tuffaceous rhyolite gravels
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Plants at roadside in coarse gravels of reddish volcanic rhyolite on grassy mid-slope hillside. Note the soft, woolly, spreading hairs on stems and phyllaries.
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Plants at roadside in coarse gravels of reddish volcanic rhyolite on grassy mid-slope hillside. This Mexican species seems to often occupy the same disturbed soil habitats at roadsides fence lines and fallow fields as the more northern 'Common Sunflower', Helianthus annuus, does in the US.
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Plants at roadside in coarse gravels of reddish volcanic rhyolite on grassy mid-slope hillside. This Mexican species seems to often occupy the same disturbed soil habitats at roadsides fence lines and fallow fields as the more northern 'Common Sunflower', Helianthus annuus, does in the US.
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Plants at roadside in coarse gravels of reddish volcanic rhyolite on grassy mid-slope hillside. This Mexican species seems to often occupy the same disturbed soil habitats at roadsides fence lines and fallow fields as the more northern 'Common Sunflower', Helianthus annuus, does in the US.
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Plants at roadside in coarse gravels of reddish volcanic rhyolite on grassy mid-slope hillside. This Mexican species seems to often occupy the same disturbed soil habitats at roadsides fence lines and fallow fields as the more northern 'Common Sunflower', Helianthus annuus, does in the US.
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Plants at roadside in coarse gravels of reddish volcanic rhyolite on grassy mid-slope hillside. This Mexican species seems to often occupy the same disturbed soil habitats at roadsides fence lines and fallow fields as the more northern 'Common Sunflower', Helianthus annuus, does in the US.
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Plants at roadside in coarse gravels of reddish volcanic rhyolite on grassy mid-slope hillside. Head of disk flowers after rays have fallen
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along fence line between grassy road right-of-way and former lake bottom cultivated for agricultural use
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along fence line between grassy road right-of-way and former lake bottom cultivated for agricultural use
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along fence line between grassy road right-of-way and former lake bottom cultivated for agricultural use
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View of post-anthesis flower head after ray flowers have fallen. Plants along fence line between grassy road right-of-way and former lake bottom cultivated for agricultural use
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Plants along fence line between grassy road right-of-way and former lake bottom cultivated for agricultural use
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This clear yellow-flowered phase is uncommon on roadsides, but fairly common in this region in cornefields and borders of fields.
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This clear yellow-flowered phase is uncommon on roadsides, but fairly common in this region in cornefields and borders of fields.
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This clear yellow-flowered phase is uncommon on roadsides, but fairly common in this region in cornefields and borders of fields.
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This clear yellow-flowered phase is uncommon on roadsides, but fairly common in this region in cornfields and borders of fields.
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This phase with orange-yellow flowers is very common in region in weedy areas, forming thick populations at edges of fields and along highway margins. This is the N-most population noted on Hwy. 2, ca. 40 km S of US border.
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This phase with orange-yellow flowers is very common in region in weedy areas, forming thick populations at edges of fields and along highway margins. This is the N-most population noted on Hwy. 2, ca. 40 km S of US border.
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This phase with orange-yellow flowers is very common in region in weedy areas, forming thick populations at edges of fields and along highway margins. This is the N-most population noted on Hwy. 2, ca. 40 km S of US border.
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This phase with orange-yellow flowers is very common in region in weedy areas, forming thick populations at edges of fields and along highway margins. This is the N-most population noted on Hwy. 2, ca. 40 km S of US border.