Drosanthemopsis

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Drosanthemopsis

Drosanthemopsis Rauschert in Taxon 31: 555. 1982 sec. Klak & al. 20181 wfo-4000012593
      Nametype: Drosanthemopsis salaria (L.Bolus) Rauschert [fide Hartmann 20172, Klak & al. 20183]
  • 1. Klak, C., Hanáček, P. & Bruyns, P. V. 2018: A recircumscription of Jacobsenia (Aizoaceae): Re-instating Drosanthemopsis, with two new quartz-endemics from Namaqualand, South Africa and sinking Knersia. – South African Journal of Botany 116: 67-81, 2. Hartmann, H. E. K. 2017: Jacobsenia - Ruschioideae. – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae, ed. 2. – Berlin: Springer, 3. Klak, C., Hanáček, P. & Bruyns, P. V. 2018: A recircumscription of Jacobsenia (Aizoaceae): Re-instating Drosanthemopsis, with two new quartz-endemics from Namaqualand, South Africa and sinking Knersia. – South African Journal of Botany 116: 67-81
  • =Anisocalyx L.Bolus, Notes Mesembryanthemum 3: 385. 1958, nom. illeg. syn. sec. Kew WCVP (2019)4 wfo-4000002162
    • Nametype: Anisocalyx salarius L.Bolus [fide Klak & al. 20185]
  • 4. Kew WCVP (2019), 5. Klak, C., Hanáček, P. & Bruyns, P. V. 2018: A recircumscription of Jacobsenia (Aizoaceae): Re-instating Drosanthemopsis, with two new quartz-endemics from Namaqualand, South Africa and sinking Knersia. – South African Journal of Botany 116: 67-81
  • =Knersia H.E.K.Hartmann & Liede in Bradleya 31: 126. 2013 syn. sec. Klak & al. 20186 wfo-4001303284
    • Nametype: Knersia diversifolia (L.Bolus) H.E.K.Hartmann & Liede [fide Klak & al. 20187, Hartmann 20178]
  • 6. Klak, C., Hanáček, P. & Bruyns, P. V. 2018: A recircumscription of Jacobsenia (Aizoaceae): Re-instating Drosanthemopsis, with two new quartz-endemics from Namaqualand, South Africa and sinking Knersia. – South African Journal of Botany 116: 67-81, 7. Klak, C., Hanáček, P. & Bruyns, P. V. 2018: A recircumscription of Jacobsenia (Aizoaceae): Re-instating Drosanthemopsis, with two new quartz-endemics from Namaqualand, South Africa and sinking Knersia. – South African Journal of Botany 116: 67-81, 8. Hartmann, H. E. K. 2017: Knersia - Ruschioideae. – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae, ed. 2. – Berlin: Springer

Description

Succulent perennial caespitose shrublet, main stems erect to 150 (−200) mm high or procumbent to 80 mm high, stems to 10 mm diam.; difference between long and short shoots distinct or indistinct. Leaves succulent, opposite, basally free or fused into a sheath, dirty green to reddish, rarely grey, ascending, trigonous to club-shaped, upper surface flattened, lower surface towards the apex distinctly keeled or keels indistinct to apically rounded, to 8–35 mm long and 4–11 mm diam., at least the last leaf-pair of the season persisting on the stem until the next season; leaf-pairs of a season isophyllous, basally free or connate for c. 1/5 of their length; epidermis with large bladder cells with thickened outer walls, cells 0.075 mm to 0.3 mm diam., ± circular to polygonal, bladder cells with flat top either covered with tiny protrusions on their surface or with many antler-like protrusions, especially along the margin. Flowers terminal, solitary, emerging from the connate portion of the 1st leaf-pair of the season, 32–40 mm diam., pedicels 6–23 mm long, sepals 6 (to 8), succulent, the two outer calyx lobes opposite and bigger than the inner four lobes, petaloid staminodes in 4 or 5 rows, pink or white or pink with white centre, inner petals shorter, filamentous staminodes very few or absent, filaments white or yellow, papillate at bases; nectary a crenulate ring; flowering July to September. Fruit a hygrochastic capsule, borderline between expanding keels and expanding sheets distinct; covering membranes covering more than ¾ of the locule, without additional closing devices below the covering membranes, closing bodies absent, present or infrequently formed, numerous sterile funicles in the upper part of the placenta, valve wings broad; locules 6–9(−16), 5–17 mm diam. Seeds with translucent testa or testa ochre to brown, testa minutely papillate, c. 0.7 × 0.5 mm.A

Bibliography

A. Klak, C., Hanáček, P. & Bruyns, P. V. 2018: A recircumscription of Jacobsenia (Aizoaceae): Re-instating Drosanthemopsis, with two new quartz-endemics from Namaqualand, South Africa and sinking Knersia. – South African Journal of Botany 116: 67-81