Senecio hispidulus A.Rich.

국표에 없다.

Senecio hispidulus, the hill fireweed or rough groundsel, is a species of flowering plant in the daisy family. It is found in many parts of Australia.

Description

Senecio hispidulus is an erect herb with an annual or a short lived perennial life cycle and can grow up to two meters tall, but is usually between 30 cm and 100 cm tall. It is a dicotyledonous herb which means the plant is vascular and that it flowers. The plant flowers many small inflorescence of a yellow or pale-yellow color. The herb is sparsely to moderately course-hairy, with shorter hairs on upper leaf surface and longer, denser and jointed hairs on lower surface (A. Rich, 1834). The primary stem is usually simple and is covered in conspicuous soft bristly hairs. S. hispidulus has a woody base which develops into a ribbed mid stem. Mid stem leaves are evenly spaced and sized, usually 70–150 mm in length. Its leaf color varying from dark green to yellow green and sometimes shaded with red. Also upper stem can be tinged with purple or red, and is usually triggered by environmental temperatures. The larger and lower leaf margins are sinuately pinnately lobed being usually three to five toothed, having a terminal tooth which is longer than that of the laterals. The uppermost smaller leaves, more in proximity to plant inflorescence are often dentate and not lobed. Plant inflorescence usually of many capitula (flower heads). Overall number of capitula contained usually between 14 and 48 containing 25 florets per capitula. Although this can be dependent on which component of S. hispidulus is found in New Zealand. Mature floret size usually between 6 mm and 12 mm long and 4 mm wide. The more mature and lobed leaves carry a very distinctive look to them, being a relatively narrow leaf. It has between 2 and 5 lobes along the side margins of the leaf. The seeds of S. hispidulus are hairy, which can be related to its name in Latin where senecio means 'old man' which can be linked to the 'bearded' or hairy seeds. S. hispidulus has small seeds usually around 0.5 mm wide and 2 mm long. In New Zealand S.hispidulus is represented by two components. These two components are

geographically segregated as one grows in the area north of 39° south, where the other component grows to the south from that point. The main differences between the two components include the number of capitula and the number of florets per capitula counted on a mature plant. The northern component having 14 capitula counted, which contain between 26 and 31 florets each. Whereas the southern component counts 48 capitula with between 17 and 24 florets on each capitula.

Senecio hispidulus - Wikipedia

https://youtu.be/ImIXh-ecwZk?t=2170