Baccharis_linearis

<i>Baccharis linearis</i>

Baccharis linearis

Species of flowering plant

Baccharis linearis, the romerillo or Chilean little rosemary, is a common shrub in Central Chile. It is frequently found in old field after agriculture. Cecidia or galls caused by the fruit fly Rachiptera limbata grow as white, spongy and globose tissues on the twigs of the plant.[2][3]

Gall on twigs of Baccharis linearis

Quick Facts Baccharis linearis, Scientific classification ...

Description

This densely branched, shrubby species reaches heights of 1–3 m. The branches are erect. Young branches have a green bark, which becomes reddish brown with age. The linear, sessile, rarely dentate leaves are 0–30 mm long and 0-2.5 mm wide. Dentate leaves are observed on young plants, but this characteristic is lost in later ontogenic stages, in which only linear leaves devoid of any dentation are formed. The capitula are formed in groups. In male plants they are 3-4.5 mm wide and in female plants they are 2–3 mm wide. They are attached to the branches by 3–8 mm long peduncles.[4]

Natural hybridisation

This species is part of a homoploid hybrid swarm involving Baccharis macraei. Together both parent species form the natural hybrid Baccharis intermedia.[5]

References

  1. [1]
    The Plant List Baccharis linearis (Ruiz & Pav.) Pers.
  2. [2]
    Aljaro, M. E.; et al. (1984). "Life cycle of Rachiptera limbata (Diptera, Tephritidae) and its relationship with Baccharis linearis (Compositae)" (PDF). Revista Chilena de Historia Natural. 57: 123–129.
  3. [3]
    Holmgren, Milena; Segura, Alejandro M.; Fuentes, Eduardo R. (2000). "Limiting mechanisms in the regeneration of the Chilean matorral – Experiments on seedling establishment in burned and cleared mesic sites". Plant Ecology. 147 (1): 49–57. doi:10.1023/A:1009804726307. S2CID 34331069.
  4. [4]
    Hellwig, F. (30.11.1990). Die Gattung Baccharis L. (Compositae - Asteraceae) in Chile. Mitteilungen der Botanischen Staatssammlung München.
  5. [5]
    Faini, Francesca; Hellwlg, Frank; Labbé, Cecilia; Castillo, Mariano (January 1991). "Hybridization in the Genus Baccharis : Baccharis linearis χ B. macraei". Biochemical Systematics and Ecology. 19 (1): 53–57. doi:10.1016/0305-1978(91)90113-E.


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