Myosotis brockiei
Myosotis brockiei is a species of flowering plant in the family Boraginaceae, endemic to southern South Island of New Zealand. Lucy Moore and Margaret J.A. Simpson described the species in 1973. Plants of this species of forget-me-not are perennial rosettes which form loose tufts or clumps, with ebracteate, erect inflorescences, and white corollas with exserted stamens.
Description
M. brockiei plants are single rosettes that often grow together to form loose tufts or clumps, and can be stoloniferous. The rosette leaves have petioles 3–72 mm long. The rosette leaf blades are usually 15–67 mm long by 2–20 mm wide, usually narrowly elliptic, elliptic, oblanceolate or narrowly obovate, widest at or above the middle, with an acute or obtuse apex. The upper surface of the leaf is densely covered in mostly flexuous, some curved, patent to erect, antrorse hairs that are oriented oblique to the mid vein. The hairs on the edges are similar but mostly erect, and the hairs on the underside of the leaf are also similar but mostly retrorse and can be oriented parallel or oblique to the mid vein. Each rosette has 1–6 erect, usually once-branched, ebracteate inflorescences that are up to 385 mm long and are usually bifurcating in an open, forked 'V' shape near the tips. The cauline leaves are similar to the rosette leaves but smaller with shorter petioles, and decrease in size toward the tip. Each inflorescence has up to 47 flowers, each borne on a pedicel up to 13 mm long at fruiting, and each without a bract.The calyx is 2–7 mm long at flowering and 3–9 mm long at fruiting, lobed to half to three-quarters of its length, and densely covered in mostly antrorse, mostly patent and flexuous hairs. The corolla is white, up to 13 mm in diameter, with a cylindrical tube, petals that are narrowly ovate, obovate or broadly obovate, and small yellow scales alternating with the petals. The anthers are fully exserted above the scales. The four smooth, shiny, light to dark brown nutlets are 1.8–2.5 mm long by 1.0–1.3 mm wide and narrowly ovoid or ovoid in shape. It flowers and fruits from November–February.
Taxonomy and etymology
Myosotis brockiei is in the plant family Boraginaceae and was described by Lucy Moore and Margaret J.A. Simpson. It is morphologically similar to other ebracteate-erect species, especially another species also endemic the Western Nelson area on the South Island, Myosotis concinna. In fact, prior to the description of M. brockiei, several botanists, including Thomas Cheeseman and Lucy Moore, included it within the circumscription of M. concinna.In the paper describing M. brockiei, the authors distinguish M. ''brockiei from M. concinna by its longer infructescences, a calyx that is longer than the corolla tube, corolla lobes that are small and ovate, and corollas that are white and non-fragrant, and smaller, ovoid and lighter colored nutlets. A more recent study showed that there are four characters that can distinguish Myosotis brockiei from M. concinna, i.e. white corollas, and hairs on the rosette leaves that are erect on the margins, oriented oblique to the mid vein on the underside of the blade, and oriented perpendicular to the mid vein on the midvein itself on the underside of the leaf.
The holotype specimen of Myosotis brockiei was collected from Gorge of the Cobb River, Western Nelson, South Island, New Zealand by W.B. Brockie and is lodged at Manaaki Whenua - Landcare Research Allan Herbarium, where there is also an isotype. The specific epithet, brockiei'', honors the collector of the type specimen, Walter Boa Brockie who was a New Zealand botanist and horticulturist.