In the latter the anthers are longer, and the divergent stigmas
decidedly longer and apparently thinner than in the long-styled form. Owing to
the state of the specimens, I could not decide whether the stigmatic papillae
were longer in the one form than in the other. The pollen-grains, distended with
water, from the short-styled flowers were to those from the long-styled as 100
to 78 in diameter, as deduced from the mean of ten measurements of each kind.
Hedyotis [sp.?] (Rubiaceae).
Fritz Muller sent me from St. Catharina, in Brazil, dried flowers of a small
delicate species, which grows on wet sand near the edges of fresh-water pools.
In the long-styled form the stigma projects above the corolla, and stands on a
level with the projecting anthers of the short-styled form; but in the latter
the stigmas stand rather beneath the level of the anthers in the other or long-
styled form, these being enclosed within the tube of the corolla. The pistil of
the long-styled form is nearly thrice as long as that of the short-styled, or,
speaking strictly, as 100 to 39; and the papillae on the stigma of the former
are broader, in the ratio of 4 to 3, but whether longer than those of the short-
styled, I could not decide. In the short-styled form, the anthers are rather
larger, and the pollen-grains are to those from the long-styled flowers, as 100
to 88 in diameter.
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