Hecastocleis shockleyi A.Gray

국표에는 없다.

Hecastocleis is a genus of low thorny shrubs with stiff branches, assigned to the daisy family. At the tip of each of the branches, inflorescences are subtended by oval, thorny, whitish to greenish bracts that enclose several flower heads which each contain only one pinkish bud, opening into a white corolla. It contains but one species, Hecastocleis shockleyi, the only representative of the tribe Hecastocleideae, and of the subfamily Hecastocleidoideae. Its vernacular name is prickleleaf. It is confined to the southwestern United States.

Hecastocleis shockleyi is a xerophytic thorny shrub of 40–70 cm (1.3–2.3 ft), occasionally 1½ m (4 ft 11 in) high. It has sixteen chromosomes (2n=16).

The leaves are alternately set along the branches. The leaf blades are hairless or with a few soft hairs, slightly olive green, stiff and leathery, with three main veins, linear to narrowly ovate in shape, 1–4 cm (0.39–1.57 in) long, their base approximately clasping the branch, with thickened margins usually carrying three to six spines of 1–3 mm (0.039–0.118 in) long, denser spaced near the base, while the tip is more or less abruptly tapering into a point.

Differences with other Asteraceae

Like Hecastocleis, some other Asteraceae also have flower heads consisting of a single floret, such as Gundelia, a perennial herbaceous plant from the Middle-East, and Gymnarrhena a winter annual from northern Africa and the Middle-East. Both have male flowers and female flowers, not hermaphrodite as in Hecastocleis, while Gymnarrhena has (trimerous or) tetramerous male florets, not pentamerous.

Hecastocleis - Wikipedia

[Hecastocleis와 마찬가지로 다른 Asteraceae에는 중동의 다년생 초본 식물인 Gundelia와 북부 아프리카와 중동의 겨울 연례 Gymnarrhena와 같은 단일 작은 꽃으로 구성된 꽃 머리가 있습니다. 둘 다 Hecastocleis에서와 같이 자웅 동성이 아닌 남성 꽃과 여성 꽃을 가지고 있으며, Gymnarrhena는 5 각형이 아닌 4 각형의 수컷 작은 꽃을 가지고 있습니다.]-Kakao i 번역

https://youtu.be/r6ycknUQG74