Scientific Name

Carex planiculmis Kom. 그늘흰사초

Subgenus classification

: Carex.

Habitats

Occurs in Gangwon, Seoul, Gyeonggi, Chungbuk, Gyeongbuk, Gyeongnam, Jeonbuk or Jeonnam.

Stem

Scattered growth, with basal sheath color light brown, and length about 30-45 cm.

Leaves

Leaves longer than the stem or similar to the stem, have glabrous surfaces, width about 5-10 mm.

Inflorescence

The number of spikes two or more. Spike shapes different (showing distinct sexual characteristics), with all spikes unisexual or some spikes bisexual, spikes arranged loosely. Terminal spike sexuality staminate or gynecandrous. Lateral spike sexuality pistillate, and erect to ascend or drooping. Lateral spike length about 1.5-4.5 cm. Terminal spike length about 2.5-3.5 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.

Perigynium

Transverse section trigonous to terete. Perigynium shape ovate-lanceolate (the broadest part near the base), and densely flowered. Perigynium glabrous. Beak long (beak more than one-third of the total length), thick (the beak is not distinguished from the perigynium , and the starting point of the beak is more than one-third of the widest part of the perigynium), with truncate mouth. Length 3.5-4 mm.

Achene

Appendage absent, no constrictions.