Carex sect. Siderostictae in Flora of China @ efloras.org

25. Carex sect. Siderostictae Franchet ex Ohwi, Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol. 11: 428. 1936.

宽叶薹草组 kuan ye tai cao zu

Authors: Yancheng Tang, Shuren Zhang, Tetsuo Koyama & Gordon C. Tucker

Rhizome elongate, rarely shortened. Leaf blades linear or oblanceolate, midvein prominent abaxially, 2 lateral veins prominent adaxially. Involucral bract sheaths ± inflated above and spathelike, blade often shorter to slightly longer than sheath. Spikes androgynous, linear to linear-cylindric. Utricles trigonous, often prominently many veined, nearly beakless to shortly beaked, orifice subtruncate. Stigmas 3.

Twelve species: E and SE Asia; eight species (six endemic) in China.

1 Lowermost involucral bract blades nearly equaling to longer than sheaths (2)

+ Lowermost involucral bract nearly bladeless or blades much shorter than sheaths (5)

2 (1) Spikes less than 2 cm; utricles with beak erect (3)

+ Spikes 2-5 cm; utricles with beak recurved (4)

3 (2) Spikes subcapitate, 5-7 mm. 172 C. subcapitata

+ Spikes linear-cylindric, 10-20 mm. 171 C. grandiligulata

4 (2) Leaves linear, 5-7 mm wide; utricles broadly ovoid, glabrous. 173 C. wuyishanensis

+ Leaves oblanceolate, 10-30 mm wide; utricles oblong-elliptic, sparsely hairy. 169 C. oblanceolata

5 (1) Leaves oblong-oblanceolate, 1-3 cm wide (6)

+ Leaves linear, less than 1 cm wide (7)

6 (5) Plants stoloniferous; utricles nearly beakless. 168 C. siderosticta

+ Plants tufted without stolons; utricle beaked. 170 C. esquiroliana

7 (5) Spike linear-cylindric, male part 1/4-1/2 length of spike; utricles ca. 3 mm, convex adaxially, beak bent downward, 1/8-1/4 length of utricle; female glume slightly shorter than utricle, apex acute. 174 C. glossostigma

+ Spike linear, male part 1/2-3/4 length of spike; utricles ca. 4.5 mm, not convex adaxially, beak erect, ca. 1/3 length of utricle; female glume ca. 1/2 length of utricle, apex subtruncate. 175 C. longshengensis

Lower Taxa