학명 : Carex gravida L. H. Bailey
분류 : Cyperaceae
사진 : 2021.06.08 , 06.14 하늘공원
식재한 수크령 속에서 올라왔다
줄기 기부
초장은 45-100cm라 하는데 위의 것은 1m 정도 되어보이고 잎은 줄기의 1/3 지점 이하에 4-5장 달린다
근경은 뚜렷하지 않다고 기재되어 있다
마디는 뚜렷하지 않아보인다
줄기 기부 엽초에 흰색과 녹색의 종선이 뚜렷하다. 사진상으로는 뚜렷하지 않지만 희미하게 가로 맥이 있다
줄기 단면은 삼각형에 중공
엽설은 2-7mm로 기재되어 있다
화수에는 5-15개의 소수가 달린다.
화수 기부의 포
소수는 웅자성이다. 소수에는 5-15개의 과낭이 경사 또는 개출로 달린다
자인편은 과낭과 길이가 비슷하다
과낭은 볼록한 면에는 3-7개의 맥이 뚜렷하고 납작한 면에는 맥이 불분명하다. 크기는 3.5–5.5 × 2–3 mm이고
선단에 0.6–1.6 mm의 부리가 있다
수과는 구형 - 타원상 구형으로 1.8–2.1 × 1.6–2 mm.
FNA
Carex gravida L. H. Bailey, Mem. Torrey Bot. Club. 1: 5. 1889.
(학명 이명)
Carex lunelliana Mackenzie
(설명)
Plants without conspicuous rhizomes. Culms (20–)30–100 cm, 2.5–8 mm wide basally, 0.7–1.6 mm wide distally. Leaves: sheaths usually loose, proximally green-and-white-striped, not white spotted, with conspicuous transverse veins on back, fronts hyaline, sometimes transversely rugose and red dotted, thin, white or hyaline and fragile at mouth; ligules 2–7 mm, shorter to longer than wide; widest leaf blades (3–)4–8 mm wide. Inflorescences with 5–15 spikes, 1–5 cm × 8–15 mm, occasionally compound, then somewhat larger; proximal bracts to 3 cm; spikes with 5–15 ascending to spreading perigynia; proximal internodes shorter than to 1.5 times as long as proximal spikes. Pistillate scales hyaline or brown with green, 1–3-veined center, ovate, 2.6–4.4 × 1.3–2.4 mm, body shorter to slightly longer than perigynium, apex acuminate to short-awned. Anthers 1.5–3 mm. Perigynia pale green to pale brown, veinless or 3–7(–12)-veined abaxially, rarely veined adaxially, 3.5–5.5 × 2–3 mm, body somewhat spongy, base thickened, margins serrulate distally; beak 0.6–1.6 mm, apical teeth 0.3–1 mm. Achenes circular to elliptic- circular, 1.8–2.1 × 1.6–2 mm.
Fruiting late spring. Prairies, ditches, swales, open forests, usually on calcareous soils; 100–1400 m; Man., Ont., Sask.; Ark., Colo., Ill., Ind., Iowa, Kans., Ky., Mich., Minn., Mo., Mont., Nebr., N.Mex., N.C., N.Dak., Ohio, Okla., Pa., S.Dak., Tenn., Tex., Va., Wis., Wyo.
Carex gravida is introduced in North Carolina.
http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242357220
FNA 세밀화
과낭과 수과 사진 참조
Carex gravida (Cyperaceae) image 50496 at PhytoImages.siu.edu
비교 미국타래사초
Carex muehlenbergii Schkuhr ex Willdenow, Sp. Pl. 4(1): 231. 1805.
Plants without conspicuous rhizomes. Culms 20–90 cm, 1.7–2.2 mm wide basally, 0.7–1.1 mm wide distally. Leaves: sheaths tight, green, sometimes white spotted, fronts hyaline, sometimes transversely rugose, mouth yellowish and thickened; ligules to 3 mm, usually wider than long; widest leaf blades 2–4 mm wide, papillose adaxially. Inflorescences with 3–10 spikes, 1.5–4 cm × 8–12 mm; proximal internodes equaling or shorter than proximal spikes; proximal bracts less than 2 cm; spikes with 8–20 ascending or spreading perigynia. Pistillate scales hyaline with green, 3-veined center, ovate to ovate-circular, body narrower than and 2/3 to length of perigynium, apex acute or with awn 0.5–1.5(–2) mm. Anthers 1.5–2.3 mm. Perigynia pale green to yellow-brown, 9–15-veined abaxially, margins serrulate distally; beak 0.2–1.2mm, apical teeth 0.2–0.5 mm. Achenes suborbiculate, 1.9–2.2 × 1.9–2.1 mm.
Varieties 2 (2 in the flora): North America.
1. Pistillate scales 2.5–3.6 mm; perigynia 5–9-veined or veinless adaxially, 3–4.2 mm. ............... var. muehlenbergii
1. Pistillate scales 2–2.5 mm; perigynia veinless adaxially, 2.7–3.1 mm. .................. var. enervis
