Perhaps the biggest surprise for the botanists from Texas A&M was Decodon verticillatus (Water Willow, Swamp Loosestrife, not shown). This willow-like shrub was supposed to grow only in a few deep East Texas counties, but apparently conditions in Leon Co. are just as much to its liking. Inconspicuous most of the year, in August it is covered with bright pink flowers.
Helianthus angustifolius (Swamp Sunflower, not shown) was another nice find. It too is more typical of East Texas, but has been found in Robertson and Leon Counties. It has long, thin, pointed leaves and purplish-brown disk corollas. Other interesting composites from this area include Aster umbellatus (Doellingeria umbellata, not shown) and the scratchy-leaved Wrinkled Goldenrod (Solidago rugosa, not shown).
Another uncommon plant is Eryngium integrifolium (Simple-leaf Eryngo, not shown). It has dense round heads of tiny, steel-blue flowers.
A number of more common wetland plants grow here. Sagittaria
latifolia
(Common Arrowhead) can be found throughout much of Texas. The arrow-head
shaped
leaves and three-petaled white flowers make the genus unmistakable. The
root tubers are
edible, giving rise to another common name--Duck Potato.
Sallow Sedge, (Carex lurida), is also common, at least in the
eastern half of the
state. In Carex, a thin sack called a perigynium surrounds the ovary and later the fruit.
This species is fairly distinctive because of its large, long-pointed
perigynia.
American Bur-reed (Sparganium americanum, not shown) looks
something like a
sedge, but actually belongs to its own family, the Sparganiaceae. Its
most distinctive
feature is its round, spiky fruiting heads.
A final treat at this stop is the diminutive Primrose Violet (Viola
primulifolia). Its
delicate, purple-veined white flowers can be spotted from February
through April or
May.
Chapter VI - Large Pond
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