Nursery Located At Ruckman Road 31 
Contoneaster pannosa nana. An interesting species from China that forms a compact, 
spreading mound from 6 to 10 inches high with short, stiff, horizotally spreading 
branches and tiny woolly gray-green leaves. As the others, this one has white 
flowers and red fruit. It likes a well drained garden soil and full sun. (pH 6-8) It 
needs winter protection in the north. 
CRYPTOGRAMMA. Rock-Brake. (Polypodiaceae, Fern Family). 
Cryptogramma crispa acrostichoides. (Parsley Fern) This dainty rock loving fern from 
the Great Lakes and Rocky Mountains looks like a little clump of fresh, crisp 
parsley. Glossy green three-pinnate fronds on straw colored stipes about 5 inches 
high. It requires an acid leafmold soil in shady moist rock crevices. (pH 4-6) It will 
not grow upright in open soil, 
CUTHBERTIA. (Commelinaceae, Dayflower Family) 
Cuthbertia graminea. One of the prettiest plants for the sunny rock garden I have ever 
seen. It consists of a little tuft of filiform leaves 4 to 6 inches high surmounted 
with bewitching bright pink Flowers about one inch across on gracefully arching 
stems from June to September. It resembles a miniature Tradescantia without the 
coarse untidiness and invasive characters of the Spiderworts. It requires a very 
sandy acid soil in sun or light shade. (pH 4-6) We grow it in 34 sharp sand and 
¥% acid leafmold. 
Cuthbertia rosea. Very similar to C. graminea but much larger in all its parts, and 
lacks the refined daintiness. Tufts of flat leaf blades from 8 to 12 inches high with 
rose colored flowers in summer, It requires the same soil and exposure as above. 
CYMBALARIA. Linaria, (Scrophulariaceae, Figwort Family) 
Cymbalaria aequitriloba. One of the most minute rock plants, forming a solid tiny 
ground cover of small rounded leaves studded with dainty lavender flowers all 
summer. This species from southern Europe thrives in a slightly acid soil rich in 
humus, in a shaded spot. Fine for shady walls, walks and rock crevices. (pH 6-7) 
It needs a little protection, especially from wind in the north. 
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Cymblaria aequitriloba 
Cymbalaria hepaticaefolia. A charming limited ground cover with larger, light green 
leaves shaped like those of the Hepaticas. Lovely pale blue flowers throughout the 
summer. It loves a rich, moist loam in shade. (pH 6-8) A native of Corsica that 
needs protection in the north. 
