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Swainsona recta is an erect or ascending perennial plant that typically up to a height of 20 cm (7.9 in) with 1 or 2 slender, ribbed stems. Its leaves are imparipinnate, mostly 30–60 mm (1.2–2.4 in) long, with 5 to 13 very narrowly linear leaflets, the side leaflets mostly 10–20 mm (0.39–0.79 in) long and 1 mm (0.039 in) wide.
Habit near Pardoo Station. Swainsona pterostylis is a species of flowering plant in the family Fabaceae and is endemic to northern parts of Western Australia. It is a low-growing or prostrate perennial herb, with imparipinnate leaves with mostly 11 to 19 broadly elliptic leaflets, and racemes of 5 to more than 30 purple or violet flowers.
It produces purple flowers in summer. The flowers are axillary, usually solitary, and resupinate. The calyx is tubular. The corolla of the flower is about 5 centimeters long, its wings and keel much shorter than the standard. The fruit is a linear oblong pod, 25 millimeters long and 5 millimeters wide. [3] [4]
The petals are dark brownish-red to dark purple, sometimes almost black, the standard petal about 10 mm (0.39 in) long and 6–7 mm (0.24–0.28 in) wide, the wings about 8 mm (0.31 in) long, and the keel usually 8–10 mm (0.31–0.39 in) long and 2–3 mm (0.
Swainsona behriana, commonly known as Behr's swainsona, [2] is a species of flowering plant in the family Fabaceae and is endemic to south-eastern continental Australia. It is a prostrate or low-growing perennial herb with imparipinnate leaves usually with 9 to 13 narrowly elliptic to egg-shaped leaflets with the narrower end towards the base, and racemes of 2 to 7 purple flowers.
Swainsona colutoides, commonly known as bladder senna or bladder vetch, [2] is a species of flowering plant in the family Fabaceae and is endemic to arid areas of Australia. It is an erect annual, shrub-like herb, with imparipinnate leaves usually with up to 13 to 17 egg-shaped leaflets with the narrower end towards the base, and racemes of 10 to 20 purple flowers.
Swainsona fraseri is a perennial subshrub, that typically grows to a height of 1.5 m (4 ft 11 in) or more, and has sparsely hairy stems. The leaves are imparipinnate, mostly 50–100 mm (2.0–3.9 in) long with 21 to 24 elliptic leaflets, 5–15 mm (0.20–0.59 in) long and 3–6 mm (0.12–0.24 in) wide with variably shaped stipules up to 5 mm (0.20 in) long at the base of the petioles.
The flowers are borne on a stem that arises from a bulb, generally in the spring or early summer. Flowers can be white, yellow, pink, purple, bluish, or streaked. The insides of the petals are often very 'hairy'. These hairs, along with the nectaries, are often used in distinguishing species from each other. [5] Species [2] [10] [11] [12] [13]