1	"Erect shrubs; flowers distinctly pedicellate in axillary fascicles of 1-5; petals sometimes with intermeshing simpie hairs at the base on both abaxial and adaxial surfaces; sepals of male flowers with basal tufts of minute, nectariferous papillae on adaxial surface; style branches conspicuously stellate-hairy at their junction; mericarps 9-11 in each fruit; pericarps stellate-hairy (Subgenus Spanifex)"	"Lawrencia berthae"
1	"Prostrate, decumbent or erect sub-shrubs, or erect shrubs; flowers subsessile or sessile, axillary, always solitary, often in densely leafy clusters; sepals adaxially glabrous; petals never with basal hairs; style branches glabrous at their junction; mericarps 2-5 in each fruit; pericarps glabrous (Subgenus Lawrencia)"	2
2	"Erect sub-shrubs or shrubs; female flowers of dioecious species lacking anthers altogether (in L. glomerata, a polygamodioecious species, sterile anthers may be present); mericarps indehiscent, 5 in each fruit, all fertile; pericarps laterally reticulate with fenestrate or alveolate areolae; seed triquetrous, smooth (Section Lawrencia)"	3
2	"Prostrate, decumbent or erect sub-shrubs, or erect shrubs; female flowers of dioecious species with sterile anthers present; mericarps dehiscent, 2-5 in each fruit, all fertile or only 1-2 fertile; pericarps unornamented; seed triquetrous or swoIlen and irregularly globular, rugose or smooth (Section Selenothamnus)"	6
3	"Short-lived, suffrutescent, simple perennial; vestiture stellate-hairy or glabrous"	4
3	"Small, woody, divaricate, perennial shrub; vestiture stellate-hairy or densely squamulose with peltate scales"	5
4	"Plant strongly rank-smelling; to 180 cm tall with one or several erect stout stems diverging from a conspicuous basal rosette, slender secondary stems contracted to form dense terminal flowering spikes; glabrous throughout; hermaphroditic"	"Lawrencia spicata"
4	"Plant not strongly smelling; to 100 cm tall without obvious rosette, secondary stems not contracted to form dense flowering spikes; vestiture stellate-hairy or glabrous; flowers solitary, often in densely leafy clusters; polygamodioecious"	"Lawrencia glomerata"
5	"Vestiture steIlate-hairy; petiolate basal leaves merging into subsessile or sessile floral leaves, blades with 1-5 prominent veins, margin becoming dentate or lobed towards apex; calyx 3.8-5.3 mm long"	"Lawrencia viridigrisea"
5	"Vestiture densely squamulose with peltate scales; all leaves sessile, blades with a single prominent mid-vein, margin entire throughout; calyx 7-10 mm long"	"Lawrencia buchananensis"
6	"Erect, decumbent or prostrate sub-shrubs; dioecious or hermaphroditic; stems without spongy periderm; leaves distinctly petiolate throughout or petiolate basal leaves merging into subsessile or sessile stem and floral leaves, steIlate-hairy or glabrous; female flowers completely lacking anthers; mericarps all weIl-developed; seed triquetrous, surface smooth or rugose (Series Halophyton)"	7
6	"Erect shrubs; dioecious; stems with spongy periderm producing dry fibrous or flaky bark; leaves sessile throughout, stellate-hairy or with armour-like covering of peltate scales; dioecious; female flowers with or without sterile anthers; sterile mericarp crushed and obliterated by developing fertile mericarp(s); seed swollen and irregularly globular, smooth (Series Selenothamnus)"	10
7	"Plant erect; vestiture sparse to dense; leaves conduplicate or flat, distinctly petiolate basal leaves merging into subsessile or sessile stem and floral leaves; dioecious; petals glabrous or sparsely to densely stellate-hairy; fruit with 2-5 mericarps a single one of which is fertile"	8
7	"Plant decumbent or prostrate; vestiture sparse to dense or glabrous; leaves flat, distinctly petiolate throughout; hermaphroditic; petals glabrous; fruit with 5 mericarps all of which are fertile"	9
8	"Plant to 130 cm tall; vestiture shortly stellate-hairy giving plant an ashen-grey appearance; leaves strongly conduplicate along prominent midvein; petals glabrous; fruit with 2-3 mericarps; seed smooth"	"Lawrencia cinerea"
8	"Plant to 60 cm tall; vestiture sparsely to densely loosely stellate-hairy, plant green in appearance; leaves flat with several more or less prominent veins; petals stellate-hairy on abaxial surface, rarely glabrous; fruit with 2-5 mericarps; seed conspicuously rugose on all surfaces"	"Lawrencia densiflora"
9	"Plant decumbent, to 15 cm tall x 40 cm wide; vestiture densely stellate-hairy; anthers 5-10; seeds conspicuously rugose on abaxial surface"	"Lawrencia repens"
9	"Plant prostrate, to 15 cm wide; vestiture sparsely stellate-hairy or glabrous; anthers 5; seed smooth"	"Lawrencia diffusa"
10	"Vestiture of young branches sparse to dense with peltate scales or stellate hairs, or glabrous, rarely pannose with palmate hairs; leaves and calyces with dense covering of peltate scales or stellate hairs; thorns often present; secondary branches with leaves in fascicles but not densely leafy or contracted; leaf margin entire or 3-5 dentate towards the apex; 1-2 mericarps fertile in each fruit"	"Lawrencia squamata"
10	"Vestiture of young branches densely pannose with palmate hairs, dense covering of peltate scales always present on leaves and calyces; thorns lacking; secondary branches densely leafy and much contracted; leaf margin entire throughout; only I mericarp ever fertile in each fruit"	11
11	"Secondary stems openly branched or loosely contracted; leaves 4.0-12.0 mm long; corollas of female and male flowers indistinguishable; anthers 10-20 in male flowers, 5-15 in female flowers; pistils 2-3; style of female flowers 2.0-7.0 mm long, branches often briefly lobed towards the apices"	"Lawrencia chrysoderma"
11	"Secondary stems much contracted giving plant a characteristic cactus-like appearance; leaves 1.5-7.2 mm long; corollas of female flowers c. length of corollas of male flowers; anthers 5-16 in male flowers, 0-8 in female flowers; pistils 2; style of female flowers 0.4-3.2 mm long, branches always entire"	"Lawrencia helmsii"