PRINGLEI var. PARVA Kimnach 1997 (engl./ fr.)
Type : Spencer s.n., collected on northwestern slopes under shrubs along trail from Cinco Señores to Socayon, San Dimas, Durango, 1350 m. HBG 18306.
Etymology : For the very small leaves.
Distribution : Mexico (Durango)
First Description by Kimnach in Haseltonia 5: 52. 1997 :
Stem to 40 cm high or more, much branched, 3 - 5 mm thick, tan.
Leaves obovate, cuspidate, upper and lower sides convex, 10 - 15 mm long, 5 - 10 mm wide, 5 - 6 mm thick near apex, glabrous, green, margin and apical half of lower surface often heavily reddened, very minutely papillose.
Flowering stems to 20 cm long, with 5 flowers or more, pedicels 4 - 6 mm long, ca 2 mm thick.
Flowers : Sepals ascending, lanceolate, acute 6 - 8 mm long, corolla 12 - 14 mm long, ca 8 mm thick, light orange.
This variety differs from var. pringlei in its very small, nearly glabrous, reddened leaves.