Daviesia ulicifolia explained

Daviesia ulicifolia, commonly known as gorse bitter-pea,^[1] is a species of flowering plant in the family Fabaceae and is endemic to south-eastern Australia. It is a rigid, openly-branched shrub with sharply-pointed, narrow elliptic, narrow egg-shaped, rarely egg-shaped phyllodes and usually orange-yellow and dark red flowers.

Description

Daviesia ulicifolia is a rigid, openly-branched shrub that typically grows to a height of up to and has spiny branchlets. Its phyllodes are narrow elliptic, narrow egg-shaped, rarely egg-shaped, long and wide and sharply pointed with a prominent midrib on the upper surface. The flowers are arranged singly or in pairs, sometimes in groups of up to seven, in leaf axils on a peduncle up to long, the rachis up to long, each flower on a pedicel long. The sepals are long, the five lobes about long. Flower colour varies with subspecies, the standard petal broadly egg-shaped with a notched tip, long, wide, and usually yellow or orange-yellow with a red ring surrounding a yellow centre. The wings are long, yellow and dark red, the keel long and maroon to red. Flowering occurs from August to October, depending on elevation and latitude, and the fruit is a flattened triangular pod long.^{[2] [3] [4] [5] [6]}

Taxonomy

Daviesia ulicifolia was first formally described by English botanist Henry Cranke Andrews in 1803 in The Botanist's Repository for New, and Rare Plants.^{[7] [8]} The specific epithet (ulicifolia) means "gorse-leaved", referring to the distribution of this leucopogon, compared to others in the genus.^[9]

In 1997, Gregory T. Chandler and Michael Crisp described six subspecies of D. ulicifolia in Australian Systematic Botany, and the names are accepted by the Australian Plant Census:

• Daviesia ulicifolia subsp. aridicola G.Chandler & Crisp^[10] has narrow elliptic, or narrow egg-shaped to linear phyllodes long and wide with two to seven flowers in leaf axils, the standard petal less than wide and orange with a red centre;^{[11] [12]}
• Daviesia ulicifolia subsp. incarnata G.Chandler & Crisp^[13] has narrow elliptic, or narrow egg-shaped to linear phyllodes long and wide with one to seven flowers in leaf axils, the standard petal wide and reddish-orange with a dark red base and a yellow centre;
• Daviesia ulicifolia subsp. pilligensis G.Chandler & Crisp^[14] has elliptic to egg-shaped phyllodes long and wide with one or two flowers in leaf axils, the standard petal wide and yellow with red markings;^[15]
• Daviesia ulicifolia subsp. ruscifolia G.Chandler & Crisp^[16] has egg-shaped to narrowly egg-shaped phyllodes long and wide with one or two flowers in leaf axils, the standard petal wide and orange with dark red markings;^{[17] [18]}
• Daviesia ulicifolia subsp. stenophylla G.Chandler & Crisp^[19] has linear phyllodes long and wide with one or two flowers in leaf axils, the standard petal wide and bright yellow with a red base and yellow centre;^[20]
• Daviesia ulicifolia Andrews subsp. ulicifolia^[21] has narrow egg-shaped or narrow elliptic phyllodes long and wide with up to five flowers in leaf axils, the standard petal wide and yellow with dark red markings.^{[22] [23]}

Distribution and habitat

Gorse bitter-pea is widely distributed in Australia, where it grows in open forest in all six states, but not the Northern Territory.

• Subspecies aridicola grows in arid areas of the Great Victoria Desert and Murchison bioregions of Western Australia, in a broad area of South Australia,^[24] and in the far south-west of New South Wales.
• Subspecies incarnata grows in hilly or mountain areas in the Mount Lofty Ranges of South Australia and in a few isolated places further south.
• Subspecies pilligensis grows in heathy woodland and open forest from south-eastern Queensland to the western slopes of New South Wales, especially in the Pilliga Scrub.
• Subspecies ruscifolia grows in forest from central New South Wales and the Australian Capital Territory to the Grampians National Park in Victoria, and in Tasmania.
• Subspecies stenophylla is mostly found in coastal areas, often in disturbed habitats from the wet tropics of far north Queensland to the Central Coast of New South Wales.
• Subspecies ulicifolia mostly grows in forest and is widespread from south-eastern Queensland, through most of Victoria to south-eastern South Australia and Tasmania.

Notes and References

1. Web site: Jeanes . Jeff A. . Daviesi ulicifolia . Royal Botanic Gardens Victoria . 21 May 2022.
2. Crisp . Michael D. . Cayzer . Lindy . Chandler . Gregory T. . Cook . Lyn G. . A monograph of Daviesia (Mirbelieae, Faboideae, Fabaceae) . Phytotaxa . 2017 . 300 . 1 . 37–44 . 10.11646/phytotaxa.300.1.1. free .
3. Web site: Daviesia ulicifolia . Australian Native Plants Society (Australia) . 21 May 2022.
4. Web site: Daviesia ulicifolia. www.anbg.gov.au. 2019-12-08.
5. Web site: Crisp . Michael D. . Daviesia ulicifolia . Royal Botanic Garden Sydney . 21 May 2022.
6. Web site: Daviesia ulicifolia . State Herbarium of South Australia . 21 May 2022.
7. Web site: Daviesia ulicifolia. APNI. 21 May 2022.
8. Book: Andrews . Henry C. . The botanist's repository, for new and rare plants . 1803 . London . 305 . 21 May 2022.
9. Book: Sharr . Francis Aubi . George . Alex . Western Australian Plant Names and Their Meanings . 2019 . Four Gables Press . Kardinya, WA . 9780958034180 . 331 . 3rd.
10. Web site: Daviesia ulicifolia subsp. aridicola. Australian Plant Census. 21 May 2022.
11. Crisp . Michael D. . Cayzer . Lindy . Chandler . Gregory T. . Cook . Lyn G. . A monograph of Daviesia (Mirbelieae, Faboideae, Fabaceae) . Phytotaxa . 2017 . 300 . 1 . 18 . 10.11646/phytotaxa.300.1.1. free .
12. Web site: Crisp . Michael D. . Daviesia ulicifolia subsp. aridicola. Royal Botanic Garden Sydney . 21 May 2022.
13. Web site: Daviesia ulicifolia subsp. incarnata. Australian Plant Census. 21 May 2022.
14. Web site: Daviesia ulicifolia subsp. pilligensis. Australian Plant Census. 21 May 2022.
15. Web site: Daviesia ulicifolia subsp. pilligensis. Royal Botanic Garden Sydney . 21 May 2022.
16. Web site: Daviesia ulicifolia subsp. ruscifolia. Australian Plant Census. 21 May 2022.
17. Web site: Daviesia ulicifolia subsp. ruscifolia. Royal Botanic Garden Sydney . 22 May 2022.
18. Web site: Messina . Andre . Stajsic . Val . Daviesia ulicifolia subsp. ruscifolia . Royal Botanic Gardens Victoria . 22 May 2022.
19. Web site: Daviesia ulicifolia subsp. stenophylla. Australian Plant Census. 21 May 2022.
20. Web site: Daviesia ulicifolia subsp. stenophylla. Royal Botanic Garden Sydney . 22 May 2022.
21. Web site: Daviesia ulicifolia subsp. ulicifolia. Australian Plant Census. 21 May 2022.
22. Web site: Daviesia ulicifolia subsp. ulicifolia. Royal Botanic Garden Sydney . 22 May 2022.
23. Web site: Messina . Andre . Stajsic . Val . Daviesia ulicifolia subsp. ulicifolia . Royal Botanic Gardens Victoria . 22 May 2022.
24. Web site: Census of South Australian Plants . State Herbarium of South Australia . 21 May 2022.