https://blog.daum.net/daehyo/7812451
학명 : Helianthus debilis Nuttall
분류 : 국화과(Asteraceae)
사진 : 2022.08.24 신구대식물원
해바라기속 종 검색표
1. Capitula large, 10-30 cm in diam.;
disk florets brown or purple.
.............................. H. annuus 해바라기
1. Capitula small, 2-5 cm in diam.;
disk florets yellow or reddish
2. Rootstock tuberous;
perennial herbs;
disk floret corollas yellow;
leaves gland-dotted abaxially.
............................... H. tuberosus 뚱딴지
2. Rootstock entirely fibrous;
annual or perennial herbs;
disk floret corollas usually reddish;
leaves not gland-dotted abaxially.
............................... H. debilis 애기해바라기
국생지
분포
북아메리카, 일본
생육환경
길가, 하천변
크기
높이는 80~160cm이다.
잎
잎은 마주나기(아래쪽), 어긋나기(위쪽),심장형 또는 긴삼각형, 양면 짧고 거친 털, 거친 톱니, 긴 엽병이다.
꽃
머리모양꽃차례 지름 5~9cm. 혀꽃 황색, 18~30개, 자성 또는 무성, 관모 2~4개, 인편상. 통상화 흑자색, 다수, 양성, 관모 2개. 총포편 3열 배열, 끝 미상으로 뾰족, 거친 털. 화상 인편 길이 10~13mm, 끝 흑자색 3열.
열매
열매는 수과로 길이 10mm, 나비 3mm이다. 편평하고, 관모 탈락, 털 밀생한다.
줄기
위쪽 많이 분지. 거친 털 있음. 담록색 또는 담자색 얼룩.
FNA 설명
Helianthus debilis Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 367. 1841.
Annuals or perennials, 30–200 cm (taprooted). Stems decumbent to erect, glabrous, hirsute, or puberulent. Leaves mostly cauline; mostly alternate; petioles 1–7 cm; blades deltate-ovate, lance-ovate, or ovate, 2.5–14 × 1.8–13 cm, bases cordate to truncate or broadly cuneate, margins subentire to serrate, abaxial faces glabrate to hispid, not gland-dotted. Heads 1–3. Peduncles 9–50 cm. Involucres hemispheric, 10–22 mm diam. Phyllaries 20–30, lanceolate, 8–17 × 1–3 mm, apices acute to long-attenuate, abaxial faces glabrous or ± hispid, not gland-dotted. Paleae 7.5–8 mm, apices 3-toothed (middle teeth acuminate, usually glabrous or hispid, sometimes ± villous or bearded). Ray florets 11–20; laminae 12–23 mm. Disc florets 30+; corollas 4.5–5 mm, lobes usually reddish, sometimes yellow; anthers dark, appendages dark (style branches usually reddish, rarely yellow). Cypselae 2.5–3.2 mm, glabrous or sparsely hairy; pappi of 2 lanceolate or lance-linear scales 1.2–2.5 mm.
Subspecies 5 (5 in the flora): United States (Atlantic and Gulf coasts).
C. B. Heiser (1956) placed 8 subspecies in Helianthus debilis; he noted that alternative taxonomic treatments might recognize these in as many as three species, or expand the single species to include H. petiolaris. Later, Heiser et al. (1969) separated three of the subspecies as H. praecox. Isozyme data (R. P. Wain 1982, 1983; L. H. Rieseberg and M. F. Doyle 1989) show that all are closely related. Documented hybridization with H. annuus further complicates the situation. The treatment by Heiser et al. is followed here.
Helianthus debilis is adventive beyond the Atlantic and Gulf coasts of the United States.
아종 검색표
1. Stems decumbent;
peduncles 9–20(–22) cm
2. Stems glabrous or puberulent;
leaf blades serrulate or shallowly, regularly serrate,
abaxial faces sparsely, if at all, gland-dotted
........... Helianthus debilis subsp. debilis
2. Stems hirsute;
leaf blades deeply, irregularly serrate,
abaxial faces densely gland-dotted
.................... Helianthus debilis subsp. vestitus
1. Stems erect;
peduncles (15–)20–50 cm
3. Leaves 8–14 cm;
peduncles (relatively slender) 20–40 cm;
discs 10–15(–17) mm diam
........................ Helianthus debilis subsp. silvestris
3. Leaves 2.5–9 cm;
peduncles (not notably slender) 10–50 cm;
discs 14–20 mm diam
4. Leaf blades usually deeply, irregularly serrate;
peduncles 10–25(–30) cm;
ray lami-nae 12–20(–22) mm
........................... Helianthus debilis subsp. tardiflorus
4. Leaf blades usually shallowly, regularly serrate;
peduncles 25–50 cm; ray laminae (15–)20–23 mm
............................ Helianthus debilis subsp. cucumerifolius
http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066877