Ursinia, Gaertner, 1791

4. Key to the Namaqualand species of Ursinia View in CoL

1. Paleae truncate, without rounded scale-like appendages; fruit straight or slightly curved with a uniseriate pappus of five broad scales ................................................................................................................................................................................................. 2

– Paleae with ovate to rotund scale-like appendages; fruit geniculate with a biseriate pappus composed of an outer series of broad scales and an inner series of setiform scales ......................................................................................................................................5

2. Woody perennials shrublets ...............................................................................................................................................................3

– Annual herbs ......................................................................................................................................................................................4

3. Stalked glands on leaves and stems; young leaves and involucral bracts white felty; paleae apices repand to slightly erosulate ..... ....................................................................................................................................................................................... U. glandulosa

– Stalked glands absent; leaves and involucral bracts glabrous to sparsely pilose; paleae apices prominently laciniate....................... .......................................................................................................................................................................................... U. laciniata

4. Pappus not exceeding corolla limb in fruit, paleae not exceeding the height of the florets after anthesis; rays orange on both surfaces, rarely yellow, often with purple or black spot at base.............................................................................. U. calenduliflora

– Pappus exceeding corolla limb in fruit, paleae extending far above the height of the florets after anthesis; rays whitish, yellow or apricot usually with a pinkish underside ................................................................................................................... U. anthemoides

5. Perennial subshrubs ........................................................................................................................................... U. chrysanthemoides

– Annual herbs.......................................................................................................................................................................................6

6. Involucral bracts cuspidate (including some of the innermost bracts) with purplish black apices; restricted to quartz patches ......... .......................................................................................................................................................................................... U. pygmaea

– Involucral bracts not cuspidate, margins and apices if marked then variously outlined purplish black ............................................7

7. Middle involucral bracts with acute to acuminate apices...................................................................................................................8

– Middle involucral bracts with obtuse apices ....................................................................................................................................10

8. Paleae appendages prominent, scale-like, firm, lustrous, brownish-yellow to brown-black, flat; margins clearly defined, somewhat thickened........................................................................................................................................................................ U. cakilefolia

– Paleae appendages inconspicuous, membraneous, transparent, somewhat undulate; margins not prominently thickened...............9

9. Inner paleae oblong with small ovate appendages; involucral bracts very broadly ovate with black crescent marks apically ........... ................................................................................................................................................................................................ U. nana

– Inner paleae lorate with elliptic appendages; outer involucral bracts outlined purplish black, inner bracts unmarked......... U. arida

10. Middle involucral bracts with transversely ovate, thin, transparent, yellowish-brown apical appendages ...................... U. speciosa

– Middle involucre bracts with ovate, thick, opaque, cloudy apical appendages ................................................... U. kamiesbergensis