Struthiola Striata

''Struthiola striata'' is a rounded, heather-like shrub of up to high that is assigned to the Thymelaeaceae family. It has small assending leaves on long straight branches, with cream, soft yellow or pinkish flowers in spikes, each of which consist of a tube of about long with 4 oval sepal lobes and 4 yellow alternating petal-like scales. It is sometimes called ribbed capespray or featherhead in English and roemenaggie, katstertjie or veërtjie in Afrikaans. It grows on coastal flats and foothills in the Western Cape province of South Africa.

Taxonomy

This species was first described as ''Struthiola striata'' by Jean-Baptiste Lamarck in 1792, based on a collection by the French gardener-botanist Joseph Martin in the Cape area (Cap B. Spei). Later botanists however, overlooked this name. Franz Wilibald Schmidt named the species ''S. sulcata'' in 1793, Henry Cranke Andrews in 1800 created the name ''S. imbricata'', while Jens Wilken Hornemann assigned the name ''S. lateriflora'' to it in 1815. In 1843 Meissner distinguished two varieties, ''S. striata'' var. ''striata'' and ''S. striata'' var. ''angustifolia''. In 1857 he considered ''S. sulcata'', ''S. imbricata'' and ''S. lateriflora'' synonyms of ''S. striata''. Charles Henry Wright in 1915 in turn regarded ''S. striata'' var. ''angustifolia'' a synonym of ''S. striata''.

Description

Ribbed capespray is a rounded shrub of up to high that emerges from a single trunk from the ground. The branches are initially covered in soft hairs pressed firmly to the surface, but become hairless when aging.
The leaves are in pairs opposing each other, more or less upright, overlapping each other, with the blade directly attached to the branche without a leaf stalk. They are oval to lance-shaped, long and generally wide, somewhat depressed along the main vein, almost pointed, with a row of hairs pressed to the surface along its rim. When the leaves are young 3 to 5 stripes are visible along the length of the outward facing surface.

The flowers are seated in the axils of the leaves over a considerable length towards the tip of the branches, an inflorescence type called a spike. The two bracteoles are set opposite each other at the base of the flower, awl-shaped, about long, with a regular row of hairs along the margin and a blunt tip ending in a tuft of hairs. The calyx is cream-coloured, with at its base a cylindrical tube of about long that is covered on the outside with soft hairs pressed against its surface and at its top 4 oval protracted, almost pointy lobes of long and wide, hairless but for a tuft of hairs at the tips of the outer pair. Four yellow, elliptic, fleshy, petal-like scales are implanted above and alternating with the sepal lobes, and are surrounded by stiff hairs that may be shorter or longer than the scales. About below the mouth of the tube sits on whorl of four seated stamens, that have a reddish wart at their tips. The ovary is egg-shaped, hairless and about 1 mm long, and is topped by a style of about long and ends in a brush-like stigma.

Differences with related species

''Struthiola'' has its flowers arranged in long spikes and each flower has 4 anthers, whereas ''Gnidia'' differs from it in having its flowers in short spikes, solitary or more often in heads, and the flowers have 8 or 10 anthers in 2 whorls. Both '' Lachnaea'', ''Passerina'' and a few ''Gnidia''-species lack scales on the calyx tubes. Both ''S. striata'' and '' S. tetralepis'' have four petal-like scales implanted at the opening of the calyx tube, while the many dozens of remaining ''Struthiola'' species have eight or twelve scales. ''S. striata'' is a roundish shrub of up to 1.5 m high with cream, soft yellow or pinkish flowers ending in oval sepal lobes of 1–2 mm long and 1.5–2.5 mm wide, and a reddish wart on the tip of the anthers, ''S. tetralepis'' is a single stemmed shrublet of up to high that has initially greenish yellow, later brownish red flowers with lance-shaped sepal lobes of long and wide, and a white wart on the anthers.

Distribution, ecology and conservation

''Struthiola striata'' is restricted to coast of the Western Cape province of South Africa, between Yzerfontein in the north and Mossel Bay in the east. It occurs in a vegetation type called sand fynbos where it grows
on lower slopes and coastal sand flats. It is honey-scented at night and gets pollinated by moths. The continued survival of this species is considered to be of least concern because its populations are stable.

References

{{Taxonbar, from=Q17582202

Struthiola striata
Endemic flora of the Cape Provinces