Scientific Name

Carex scabrifolia Steud. 천일사초

Subgenus classification

: Carex.

Habitats

Occurs in Gangwon, Seoul, Gyeonggi, Chungnam, Gyeongnam, Jeonbuk, Jeonnam or Jeju, and it lives in coastline.

Stem

Scattered growth, with basal sheath color dark brown to reddish brown, and length about 30-60 cm.

Leaves

Leaves longer than the stem, similar to the stem or shorter than the stem, have glabrous surfaces, width about 2-3 mm.

Inflorescence

The number of spikes two or more. Spike shapes different (showing distinct sexual characteristics), with all spikes unisexual, spikes arranged loosely. Terminal spike sexuality staminate. Lateral spike sexuality pistillate, and erect to ascend. Lateral spike length about 1.5-2 cm. Terminal spike length about 1-3.5 cm. Number of spikes per node one (one spike in one bract).

Bract

Lowermost bract shape leaf-like.

Glume

Staminate glume awn absent. Pistillate glume awn absent or short (awn less than one-third of the total length). Pistillate glume color whitish green to light brown (?) or dark brown to blackish brown (?).

Perigynium

Transverse section trigonous to terete. Perigynium shape elliptical to narrow elliptical (the broadest part in the center) or ovate-lanceolate (the broadest part near the base), and densely flowered. Perigynium glabrous. Beak short (beak less than one-third of the total length), with bidentate to bifid mouth. Length 6-8.5 mm.

Achene

Appendage absent, no constrictions.