Soil

Senecio serpens

S. repens, Kleinia repens

Thick blue tubular leaves, branches from base. Will spread quickly along the ground. Small white puffball compound flowers. Asteraceae, Daisy Family.

Sinningia tubiflora

Tuberous caudex to 6″, stems to 12″. One of the few caudexes that can grow from leaf cuttings.

Stapelia hirsuta

Soft stems to 14″h; large carrion blooms, burgundy with hairs

Stephania perrieri

Deciduous; variable caudex to 12″, vining to 30ft.
Water well when leafed out.

Stephania venosa

Moderate sized caudiciform, 10-15″ across, with broad green leafy vines and blood red sap. Small orange flower sprays. Donut-shaped seeds are called Moon Seeds. Low water, but rich soils.

Stetsonia coryne

Tall columnar to 26ft.; branchy with long spines; night blooms

Tacinga saxatilis

Opuntia saxatilis

Medium prickly pear, sprawls to 3ft, long white soft spines

Tephrocactus geometricus f. inermis

Stunning globular stems stacked up, will break off and roll with few recumbent spines. Ivory white flowers. very arid, can handle extreme desert.

 

Tephrocactus turpinii

Opuntia turpinii
Tephrocactus articulatus

Long spineless stems do have small glochids. Upright to 2 feet.

Thelocactus bicolor

Usually solitary, stems can get 15″ high x 6″ around. Magenta flowers fade to white towards the center, and then get very dark below.

Tillandsia cyanea

Semi-epiphytic, can grow with some soil unlike other Tillandsias. Blue flowers on bright pinik/red paddle shaped spikes.

Titanopsis calcarea

Small clumper forms dense mats of thick open leaves. Winter-growing, keep dry in summer. Grows in limestone strewn areas.