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Disperisjohnstonii Rchb.f. ex Rolfe in D.Oliver & auct. suc. (eds.)
Ball, John S.
Terrestrial African Orchids: A Select Review
Browning, Jane; Hennessy, Esmé
For synonyms, distribution, description and notes see Fl. Zamb. 11 (1): 231, t. 75 (1995).
Additional information from J.S. Ball notes, diagrams and paintings.
J.S. Ball 914 was growing ’in semi shade in open grassland under palms and Acacia trees. Juvenile leaves subopposite pair v. similar to D. reichenbachiana strong purple below and dull purplish green above with ± pronounced silver veining. Flrs 1—4 very striking deep buttercup yellow hood of DS [dorsal sepal] and petals, pure white sometimes faintest pink tinged LS [lateral sepal]’.
‘Spur sacs on the underside of lateral sepals were 5 mm from base, white, with very faint pink tinge, more marked below and towards apex. Sac barely pouched’ .
1, habit; 2, leaf , under surface; 3, leaf, upper surface; 4, flower, side view; 5, lip and column, side view; 6, flower, face view; 7, lip and column, front view; 8, pollinarium; 9, lip; 10, petal; 11, odd sepal. (a, anther; p, pollinarium; l, lip; s, stigma; st, staminode.)
1—11 not to scale; from J.S. Ball 914; (1—4, 6, drawn by J.B.M. Ball).