A recircumscription of Jacobsenia (Aizoaceae): Re-instating Drosanthemopsis, with two new quartz-endemics from Namaqualand, South Africa and sinking Knersia * Author Klak, C. Author Hanáček, P. Author Bruyns, P. V. text South African Journal of Botany 2018 2018-05-31 116 10 67 81 http://dx.doi.org/10.1016/j.sajb.2018.02.402 journal article 305015 10.1016/j.sajb.2018.02.402 07aac6e3-7bd1-4d61-b4cc-a813966f8891 1727-9321 14036691

Table 1 Comparative list of taxonomically important characters in Jacobsenia, Knersia and Drosanthemopsis.

	Jacobsenia clade	Drosanthemopsis clade
	Jacobsenia	Knersia (= Drosanthemum diversifolium)	Drosanthemopsis bella sp. nov. 1	Drosanthemopsis vaginata (= Jacobsenia vaginata)	Drosanthemopsis kwaganapensis sp. nov. 2
Growth form
Habit	Shrubby and erect or compact	Shrubby and erect	Compact, mat-forming	Compact, mat-forming	Compact
Long and short shoots	Present or no clear distinction	Present	No clear distinction	No clear distinction	No clear distinction
Leaves
Leaf pairs	Often slightly anisophyllous	Isophyllous	Isophyllous	Isophyllous	Isophyllous
Colour	Bright green	Dirty green, often suffused with red	Light green, often suffused with red	Gray	Dirty green
Shape	Terete or slightly keeled	Trigonous and slightly keeled towards apex	Trigonous and slightly keeled towards apex	Trigonous and distinctly keeled towards apex	Trigonous and slightly keeled towards apex
Extent of fusion towards bases	Shortly fused	Not fused	Shortly fused	Distinctly fused into sheath for about lower 1/3	Distinctly fused into sheath for about lower 1/3
Bladder cells
Diameter surface	0.08–0.1 Smooth or with a central spike	0.2–0.3 mm With antler-like protrusions	0.2–0.3 mm With antler-like protrusions	0.075–0.1 mm With antler-like protrusions	0.075–0.1 mm With antler-like protrusions
Flower
Diameter	53–85 mm	30–45 mm	30–40 mm	30–40 mm	30–35 mm
Sepals	5 or 6	6	6	6 (–8)	unknown
Carpels	5 or 6 (–8)	6	6	6–13	7–8
Filamentous Staminodes	Absent	Absent	Absent	Absent	Absent
Colour	White or lemon	White to deep	White, pink or pink	White	White
	yellow	pink	with white centre
Fruit
Borderline expanding sheet/keel	Indistinct	Distinct	Distinct	Distinct	Distinct
Closing bodies	Absent	Present	Infrequently formed	Absent	Absent
Locules	5 or 6 (–8)	6	6	6–13	7–8