Question: Which genus has more species, Homalocladium or Digitalis?

Context paragraphs:
Homalocladium: Homalocladium platycladum (centipede plant, tapeworm plant or ribbonbush) is a plant in the knotweed family from New Guinea and the Solomon Islands.  It is the sole species in the genus Homalocladium.

Digitalis: Digitalis ( or ) is a genus of about 20 species of herbaceous perennials, shrubs, and biennials commonly called foxgloves.

Isoplexis: Isoplexis is a section of 4 species of flowering plants within the genus "Digitalis" in the plantain family Plantaginaceae.  The species of section Isoplexis differ from other plants in the genus "Digitalis" in that their monosymmetric (sometimes called zygomorphic) flowers have a distinctive large upper lip rather than large lower lip and the species are endemic to the Canary Islands (the species "D. canariensis", "D. chalcantha", and "D. isabelliana") and Madeira ("D. sceptrum").

Digitalis laevigata: Digitalis laevigata, common name Grecian Foxglove or Giraffe Foxglove, is a species of flowering plant in the genus "Digitalis", in the family Plantaginaceae.

Digitalis obscura: Digitalis obscura is a flowering plant, commonly known as the Sunset Foxglove or Willow-leaved Foxglove.  It is native to regions in Spain and Africa, but can be grown as an ornamental flower around the world.  It is a perennial woody plant belonging to the family Plantaginaceae.  (Along with the other foxgloves it used to be placed in the figwort family, Scrophulariaceae; however, recent genetic research has moved the genus "Digitalis" to a larger family.)  The Sunset Foxglove is similar to many of the foxglove species in its high toxicity and medicinal use as a source for the heart-regulating drug digitalis.  Its strikingly distinctive amber- to copper-colored flowers give the species its name and help distinguish it from other members of the genus.

Antirrhineae: The Antirrhineae are one of the 12 tribes of the Plantaginaceae family.  It contains the toadflax relatives, such as snapdragons.  They are probably most closely related to the turtlehead tribe (Cheloneae) and/or a large and badly resolved core group of their family including plants as diverse as water-starworts ("Callitriche"), foxgloves ("Digitalis"), and speedwell ("Veronica").  The Antirrhineae include about 30 genera with roughly 320 species, of which 150 are in genus "Linaria".  The type genus is "Antirrhinum" .

Rehmannia elata: Rehmannia elata (Chinese foxglove) is a species of flowering plant in the family Orobanchaceae, native to China.  Growing to 150 cm tall by 50 cm broad, it is an herbaceous perennial with veined, hairy leaves and pink, tubular flowers with darker pink stripes in summer.  The flowers bear a superficial resemblance to foxgloves, hence the common name "Chinese foxglove", which is also applied to the whole genus.  However this species is not closely related to the true foxglove ("Digitalis").

Digitalis ferruginea: Digitalis ferruginea, the rusty foxglove, is a species of flowering plant in the genus "Digitalis" of the family Plantaginaceae.  It is native to Hungary, Romania, Turkey and the Caucasus.  It is a biennial or short-lived perennial plant growing to 1.2 m , which forms a rosette of oblong dark green leaves and carries spikes of brown, tubular flowers in summer.

Digitalis grandiflora: Digitalis grandiflora, the yellow foxglove, big-flowered foxglove, or large yellow foxglove, is a species of flowering plant in the genus "Digitalis", family Plantaginaceae (formerly Scrophulariaceae).  It is native to southern Europe and Asia.  In mountains it grows on warm, bushy slopes or areas left after logging.

Digitalis davisiana: Digitalis davisiana is a species of the genus Digitalis in the family Scrophulariaceae.

Supporting paragraphs: Homalocladium Digitalis
Answer: Digitalis