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Nivenia stokoei (Guthrie) N.E. Br. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: Transactions of the Royal Society of South Africa 11: 267. 1933. (Trans. Roy. Soc. South Africa) Name publication detail
 

Project Name Data (Last Modified On 6/6/2016)
Acceptance : Accepted
Taxon Profile     (Last Modified On 6/7/2016)
Description : Rounded, woody, evergreen shrubs (0.3–)0.8–1.5 meters high. Stems simple or irregularly branched, leafy stems 3–4 mm wide. Leaves narrowly lanceolate, 80–130 × 3–5(–6) mm, margins narrowly hyaline. Inflorescence a ± flat-topped false panicle of (12–)20–40 flowers, bracts subtending branches of peduncle dry, 2–4 mm long, ultimate peduncles bearing single flowers; spathes 6–8 mm long, leathery, dry and dark brown near apices, inner slightly longer than outer; floral bracts dry, light brown, upper margin often lacerate, (10–)12–15 mm long. Flower salver-shaped, not heterostylous but styles somewhat variable in length, pale or deep blue, ± white at base of tepals and in tube; perianth tube 27–33(–37) mm long, ± cylindric, 1.2 mm wide at base, expanding to 2 mm at mouth; tepals spreading, elliptic-oblanceolate, 16–22(–25) mm long, outer 8–10 mm wide, inner 6.5–8.0 mm wide. Filaments (6.5–)8–10 mm long; anthers 2–2.8(–3) mm long. Style exserted (8–)10–15 mm from tube, usually dividing 3–5 mm beyond anther tips, in some plants ± as long as filaments, branches filiform, 2–3 mm long, recurved. Capsules globose-obovoid, 5–6 mm long, ± 4.5 mm diam., rarely with seeds in all locules. Seeds mostly 1 or 2 per locule, rugose, blackish with a loose translucent outer layer, ± 5 × 2.8 mm, smaller if 2 per locule. Chromosome number 2n = 32. Flowering time: mid-January to March.
Country : South Africa
South African Province : Western Cape
Distribution and ecology : restricted to the southwestern corner of the Caledon district of Western Cape, extending from the foot of the mountains at Betty's Bay and Kleinmond, close to sea level, to elevations of ± 800 meters at Highlands; in open rocky sites in nutrient poor sandstone derived soil.
Diagnosis : largest-flowered species of the genus, Nivenia stokoei has brilliantly colored flowers on relatively crowded inflorescences, pale to deep blue flowers and a perianth tube, 27–37 mm long, all of which make it easy to recognize. The large flower size is reflected in the bracts and spathes so that the species can also be identified after flowering. The relatively large inflorescence normally has 20–40 flowers though there may be as few as 12 in depauperate plants. Flowers are not heterostylous, although the style varies in length in different plants, and the flowers are solitary in the binate rhipidia, similar to those of N. concinna and it is to this species that N. stokoei seems most closely allied. N. concinna has a slightly smaller flower with a perianth tube ± 15 mm long, and inflorescences of only 2–6 flowers. A fine illustration of N. stokoei is available in Flowering Plants of Africa 38: t. 1504. This striking species was properly documented only in 1924, remarkable after over 150 years of botanical interest and exploration of the Cape flora. In sheltered sites plants may reach heights of up to 1.5 meters but in very rocky or exposed places individuals are usually dwarfed and less than a metre and sometimes no more than 300 mm high. Nivenia stokoei is a particularly handsome species and well grown, healthy plants in full bloom are a wonderful sight.

 
 


 

Specimens whose coordinates are enclosed in square brackets [ ] have been mapped to a standard reference mark based on political units.
 
 
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