Rudbeckia 검색표
https://daehyo49.tistory.com/7817042
Rudbeckia 종류 (비공개)
https://daehyo49.tistory.com/7811062
루드베키아[Rudbeckia hirta 아종 검색표 - 수잔루드베키아와 원추천인국 비교]
https://daehyo49.tistory.com/7811061
애기루드베키아(Rudbeckia triloba) ←트리로바원추천인국
https://daehyo49.tistory.com/7813805
학명 : Rudbeckia hirta L. var. hirta
분류 : 국화과(Asteraceae)
사진 : 2025.09.12 전주수목원
* Rudbeckia hirta를 FNA에서는 4개의 아종으로 세분한다
Rudbeckia hirta Linnaeus, Sp. Pl. 2: 907. 1753.
Black-eyed Susan
Annuals, biennials, or perennials, to 100 cm (taprooted or roots fibrous). Stems hispid to hirsute (hairs spreading, 1+ mm). Leaves: blades elliptic, lanceolate, or ovate (not lobed), bases attenuate to cuneate, margins entire or serrate, apices acute, faces hispid to hirsute; basal petiolate, blades 8–30 × 0.5–7 cm; cauline petiolate or sessile, blades (sometimes pandurate) 3–20 × 0.4–4 cm. Heads borne singly or (2–5) in loose, corymbiform arrays. Phyllaries to 3 cm (faces hispid to hirsute). Receptacles hemispheric to ovoid; paleae 4–6 mm, apices acute, often attenuate, abaxial tips hirsute to hispid. Ray florets 8–16; laminae (usually uniformly yellow to yellow-orange or with a basal maroon splotch, sometimes mostly maroon) elliptic to oblong or oblanceolate, 15–45 × 5–10 mm, abaxially hispid to hirsute. Discs 12–22 × 10–20 mm. Disc florets 250–500+; corollas proximally yellowish green, distally brown-purple, 3–4.2 mm; style branches ca. 1.5 mm, apices subulate. Cypselae 1.5–2.7 mm; pappi 0.
Varieties 4 (4 in the flora): e North America.
Some strains of Rudbeckia hirta are cultivated and/or used in seed mixes for "re-naturalization" and erosion control.
1. Annuals, biennials, or perennials;
stems branched at bases or proximal to or at or near mid heights,
leafy mostly toward bases (leaves smaller distally);
peduncles usually at least 1/2 plant heights
(Gulf Coastal Plain, Florida to Texas)
2. Stems branched mostly at or near mid heights;
basal leaves oblanceolate, faces hispid to ± sericeous;
Georgia to Texas
....................................... Rudbeckia hirta var. angustifolia
2. Stems branched at or near bases (plants often scapiform);
basal leaves obovate to nearly orbiculate, faces scabrous to hirsute;
c, s Florida
..................................... Rudbeckia hirta var. floridana
1. Biennials or perennials;
stems branched mostly beyond mid heights,
leafy ± throughout;
peduncles to 1/3 plant heights
3. Leaves: basal blades broadly ovate to broadly elliptic,
2.5–7 cm wide (lengths mostly 2 times widths),
margins coarsely toothed;
cauline (sometimes sessile) lanceolate, ovate, or pandurate
(mostly Appalachian Highlands toIllinois)
................................... Rudbeckia hirta var. hirta (루드베키아, 수잔루드베키아)
3. Leaves: basal blades lanceolate to oblanceolate,
1–2.5(–5) cm wide (lengths 3–5 times widths),
margins entire or serrulate;
cauline blades spatulate, oblanceolate, or broadly linear
................................ Rudbeckia hirta var. pulcherrima(원추천인국)