Tas, 6137. 
BOUCEROSIA maroccana. 
Native of Marocco. 
Nat. Ord. AscLepiADEH.—Tribe SraPELiE#. 
Genus Boucerosta, Wight ¢ Arn. ; (Benth. 5: Hook, f. Gen, Plant., 
vol. ii, ined.). 
Boucerosta maroccana; ramis tetragonis marginibus angulato sinuatis, foliis 
trulliformibus acutis, corolle lobis nudis tubo intus hirsuto, corone 
staminew processubus 5 incurvis gynostegio incumbentibus cum 10 
erectis geminatim collateralibus capitatis alternantibus. 
A near ally of B. Gussoniana (Apteranthes Gussoniana, Tab. 
nost. 5087), of Algeria, and so like it that I long hesitated 
before deciding upon figuring and describing it as new; be- 
sides, however, the differences of habit, which are more easily 
seen than described, there are so many other differential 
characters that, taken altogether, it is impossible to unite this 
with the Algerian plant. The angles of the stem, instead of 
being faintly undulate, are longitudinally divided into broadly 
triangular lobes, each tipped with a minute leaf, which 
instead of being sessile adnate and upceurved, is trowel-shaped, 
contracted at the base, and usually deflexed. The flowers are 
fewer, on longer pedicels; the corolla-lobes want the long 
cilia, being quite naked, and are shorter, not so reflexed, and 
of a clearer purple, with fewer yellow bars, and the base of 
the tube inside is densely velvety. But the greatest dif- 
ference is in the staminal crown, which in B. Gussoniana 
presents five capitate incurved processes, each with a knob on 
each side at the base; but in this the five incurved processes 
are inflexed and incumbent upon the stigma, whilst the lateral 
knobs are elevated on erect stalks. How far any or all these 
characters are variable can only be known by a long and 
careful study. ‘The probability of their proving constant is 
rendered more probable by the wide. difference of habit of — 
the two plants, the 4. Gussonana being a native of saline 
DECEMBER Ist, 1874. 
