Field Horsetail
Equisetum arvense
Observed along a moist ravine in ponderosa woodland in Reynold's Canyon, Sierra Ancha, Gila Co., Arizona, USA. June 2010.
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FLOWERS: No Flowers! This ancient plant lineage arose prior to flowering
plants. On separate stems in spring there are spore-bearing structures that
resemble cones.
LEAVES: No Leaves. Photosynthetic stems are hollow and appear jointed.
At each joint a whorl of finer stems emerge that may be further subdivided as
well.
HERB: Herbaceous plant regrowing in spring from underground stems.
Mostly less than 50 cm tall. Longitudinal striations on stems.
RANGE: Found in ponderosa woodlands where surface moisture is present at
least seasonally. Also found throughout North America including the Arctic.
FRUIT: Minute spores are released from the sporangia.
UNARMED.
Equisetaceae -- Horsetail Family
More Information:
- Southwest Environemtnal Information Network
- Jepson Manual
- Wikipedia
- USDA Plant Profile
- ITIS Taxonomic Report
- Google Images
- Google Scholar Literature Search