Home Iridaceae of sub-Saharan Africa
Genera
Species
Iridaceae in sub-Saharan Africa
Photo Gallery
Geographic Search
References
Search Builder
About this project
!Hesperantha secunda Goldblatt & J.C. Manning 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: Bothalia 43(2): 150–151. 2013. (Bothalia) Name publication detail
 

Project Name Data (Last Modified On 6/6/2016)
Acceptance : Accepted
Taxon Profile     (Last Modified On 8/16/2016)
Description: Plants 100–200 mm high. Corm ovoid, 7–8 mm diam; tunics woody, concentric. Stem unbranched, smooth, with minute, membranous, scale-like bract up to 3 mm long on upper third of stem. Foliage leaves 3, lower two basal, linear to narrowly sword-shaped, falcate or straight, finely hairy 2.5–4.0 mm wide, margins raised and winged at 90º to surface, main vein also raised with narrow wings parallel to surface, uppermost leaf sheathing lower part of stem for all or most of its length, several ribbed, finely hairy. Spike ± nodding, mostly 3–7-flowered; bracts subequal, 7–10 mm long, outer green or becoming ± pale and membranous, inner membranous with 2 green keels. Flowers nocturnal, creamy white, outer tepals grey-brown on reverse, nodding, tepals spreading at right angles to tube and vertical, strongly scented; perianth tube cylindric, curving outward, 6–7 mm long; tepals 10–11 × 2.5–3.5 mm, inner slightly shorter and wider than outer. Filaments ± 3 mm long; anthers 5–6 mm long, spreading almost parallel to tepals, white; pollen white. Style branches ascending, ± 4 mm long, reaching to base or lower fourth of anthers. Flowering time: September to mid October.
Type specimen: Peter Goldblatt - 5810 - NBG
Country: South Africa
South African Province: Northern Cape
Distribution and ecology: known from just three populations in Northern Cape, two from the Roggeveld Escarpment west of Middelpos and the other from the southern slopes of the Keiskei Mtns southeast of Calvinia; growing in shallow, fine-grained soil over rocky (?sandstone) pavement.
Diagnosis: when first collected Hesperantha secunda was referred to H. pilosa because of its pilose leaves and the scale-like bract in the upper third of the stem. However, its unusual, somewhat fleshy leaves with thickened to winged margins and thickened main vein and nearly secund spike prompted a reappraisal of its status and it is now regarded as a separate species, perhaps most closely allied to H. pilosa. In addition to its unusual leaves, the flowers are nodding on a curved perianth tube and have unusually short, ascending style branches, ± 4 mm long. H. pilosa differs in having plane to ribbed leaves (or rarely terete or with slightly winged margins) and different floral morphology: all collections of H. pilosa have upright flowers with a straight perianth tube, tepals 9–16 mm long (vs 10–11 mm in H. secunda) and longer style branches, 7–11 mm long, spreading laxly over the tepals. Flowers of H. secunda open at sunset, the tepals beginning to unfold at ± 17:00, are fully expanded by 18:00 and remain open until the early hours of the morning. The strong scent has a slightly unpleasant acrid component.

 
 


 

Specimens whose coordinates are enclosed in square brackets [ ] have been mapped to a standard reference mark based on political units.
 
 
© 2024 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110