Lepterus repens (Lepturus)

Lepturus is native to Kure. Its range was very restricted as recently as 2001, but out-planting and the 2011 tsunami helped distribute the seeds widely along the west coast where it is now abundant. It grows in bunches with long round stems.

Lepturus cotyledons are long and relatively broad compared to the first true leaves, with a consistent width over most of the length of the blade, then tapering abruptly to a point.  The blades have fine but distinct striations.

Young sprouts are characterized by stiff, narrow, curved and curled blades. It is most likely to be found growing in conjunction with Sporobolus, which has broad tapered blades, an E. amabilis, which has relatively short broad leaves and a reddish basal stem.

Lepturus sprouts can also appear red at the base although the color is often a bit more on the purple side, and is likely to be associated with the die-off of early blades. In both of the plants below the narrow blade and erect growth pattern distinguish them from E. amabilis.

Older Lepturus have an erect growth pattern and long, narrow blades. E. amabilis tends to be prostrate with shorter blades and again is more prone to a red basal stem.

At larger sizes, Lepturus often grows radially outward in a rosette pattern. Though this pattern is similar to that seen with E. amabilis, and the branching is also similar, Lepturus is generally larger, denser, and again lacks the red stems found with E. amabilis.

Mature Lepturus bunches have a large number of round, segmented stems. The mature blades are long and narrow, with fine striations and minute teeth in the margin. The teeth are visible in the photo below right, on the lower margin of the upper blade.

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