certain Species of the Genus Ckristisonia. 125 
is similar to that of the scale-leaf. The corolla greatly over- 
tops the calyx by its long tubular portion, which terminates in 
five subequal, roundish lobes which are denticulate at the apex. 
The colour of the corolla is white, its lobes being edged with 
deep violet. In shape it is funnel-shaped and curved (Figs. 1, 
15, 16). A section of the petal reveals a loose ground-tissue, 
whose cells contain a few starch-grains ; some cells are filled 
with minute fungal spores or conidia whose hyphae are seen 
in nearly every cell. The epidermal cells have conspicuous 
nuclei ; those of the lower surface are purplish, with dense 
contents of starch-grains or other granules. Mucilage-glands 
occur on both surfaces, especially on the outer one, where they 
produce a thick film of the secretion. 
The stamens are four in number (Figs. 15, 16, 1 7). Of these, 
the two posterior ones have each a peculiar swollen prolongation 
or spur from the connective, which is equal in length to the 
anther and deflexed, arising near the attachment of the fila- 
ment; this spur is of a loose internal structure, with large 
intercellular spaces, this tissue being traversed by a single 
small bundle ; the structure terminates in a sharp point 
formed of numerous stone-cells with curious lignified thicken- 
ings. Each of the four anthers in this plant is unilocular 
when mature, though bilocular before the pollen-grains are 
ripe. According to Wight 1 and Hooker 2 , each of the anthers 
of the posterior pair of stamens has one imperfect, sterile 
loculus, which is spurred or appendaged ; from my own ex- 
amination the spur-like appendage appears as a prolongation 
of the connective. 
In a transverse section of the anther it is seen that the cells 
of the epidermis, and of one or two of the underlying layers, 
on the dorsal side of the anther, nearest the attachment of the 
filament, have lignified spiral thickenings ; also in the cavity 
of the suture on the ventral surface, a few cells of the second 
layer from the outside have similar spiral thickenings. It is 
possible that these assist in preventing a rupture of the anther- 
1 Wight, leones Plantarum Indiae Orientalis, Vol. iv. p. 5. 
2 Hooker, Flora of India, Vol. iv. p. 321. 
