December, 1921] 
THE ORCHID REVIEW. 
i6j 
purpurella. It has the same habit of leaves, the same small flowers with 
recurved lips, and a very similar lip-pattern. Gt purpurella has broader 
leaves and a larger, flatter lip, with a very different pattern. It is not safe 
to say much about the colour of dried specimens, but as compared with- 
O. purpurella, the flowers of O. cruenta appear to be of a paler, pinker 
purple, and the bracts of a brighter purple, suffused over the whole bract. 
The spur also is more slender. The difference in the leaves is very marked. 
In O. cruenta they have very heavy, rather angular spots, or bright purple 
blotches on both sides, very different from the fine dots of O. purpurella, 
often so scantily distributed. Also the leaf-sheaths of O. cruenta are longer 
and more funnel-shaped. In fact, O. cruenta might be described as a 
dwarf, spotted variant of O. incarnata, much as O. purpurella might be in 
relation to O. pulchella, which is referred to below. 
Of form (a) a few individuals are found with leaves unspotted and taller. 
Form (b) is very closely connected with the plant which Dr. Druce has 
named O. praetermissa var. pulchella, which occurs plentifully in Scotland. 
The flowers of the two forms are quite alike. The difference is in the fact 
that O. pulchella is taller, often quite slender, and has no spots on the 
leaves. We think that we have here a case in which two unit 
Mendelian characters are concerned, one for “dwarfness” and one for 
“leaf-spots,” and that two segregates at least have established themselves. 
At the same time, we think it will be wise to retain the two names, for 
though in the Isle of Arran the types run into one another, elsewhere they 
appear separately. The final conclusion will depend on further study in 
the field. 
Trichosma suavis. —This species was brought from the East Indies to 
Chatsworth by Mr. Gibson, then a collector for the Duke of Devonshire. 
Concerning it, Gibson states ( Bot . Reg., 1842, t. 21 ): “ It inhabits the 
Chirra district of the Khoseea, and grows upon trees in densely shaded 
woods near the summit of the hills. It has a strong perfume, somewhat 
resembling Melicgrass, on which account it is highly esteemed by the wood¬ 
cutting natives, who are fond of adorning their hair with its blossoms, and 
which circumstance gave me a clue to its discovery. It is growing here 
luxuriantly upon a block of wood, and is now filled with dead and living 
vegetable matter, the latter consisting of the roots and stems of live native 
Ferns, which are luxuriating with this and other Orchideous plants on the 
same block of wood.” The coloured plate shows the pseudobulbs to be two¬ 
leaved, spindle-shaped, about six inches long, and covered with dark brown 
sheathing seales. On the young shoots the scales are thick and fleshy, and 
covered with green warts. 
