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492 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
described from Colombia, with the same type of inflorescence and 
connective. Distinct as these species are in appearance, they are 
matched in their more important stamen characters by various 
species of the Old World. 
In some species the anthers sacs bear at the apex one or two 
scarious cusps, sometimes nearly as long as the sacs; in one or two 
others they bear a few filiform setae. Although the presence or ab- 
sence of these cusps has been considered of importance, and un- 
doubtedly is so, I have not found it of sufficient constancy in the 
material examined to be of much use as a key character. Certain 
species, it is true, never possess these cusps, but in others in which 
they occur they may be found in one flower dissected, or on some 
anthers only, and may be absent in others from the same specimen. 
It may be that they are deciduous or easily broken off; but when 
found at all in dissected material they do not appear especially 
fragile, and I am unable to explain their irregular occurrence. In 
consequence, I have avoided in so far as possible the use of the pres- 
ence or absence of these appendages as a character in the key, and 
when its use has seemed unavoidable have made provision under 
both headings for those species in which variation has been found 
in my dissections. 
Rinorea is distinguished from Hybanthus (taken in its broad 
sense to include /onédiwm, incorrectly called Calceolaria by some 
modern American authors?) by its regular flowers. Those of Hyban- 
thus always show at least a slight enlargement of the keel petal and 
so far as the North American species of Hybanthus are concerned, at 
any rate, may also be distinguished by the fact that the anthers or 
connective scales of at least some of the stamens are connate. The 
sepals of Rinorea are generally described as equal, but this is not 
true of all the species. In 2. sylvatica, for example, the two outer 
sepals are larger than the others and thicker; but all are similar in 
form, and the passage from the largest and thickest outer sepal to 
the smallest and thinnest innermost is gradually effected through 
the intermediate sepals. 
*The genus Calceolaria of the Scrophulariaceae was founded by Linnaeus 
filius in 1771. Unfortunately, the name had already been used three times 
previously in botany. Its first publication by Loefling (Iter Hisp. 183) in 
1758 is invalid according to the American Rules, since no truly binominal species 
was included, the name Calceolaria frutescens used for Loefling’s third species 
being merely a chance binomial having no relation to the Linnaean binomial 
system. As used by American authors for the group of species sometimes 
separated from Hybanthus under the more commonly used name Tonidium 
Vent. (1800), it dates from the German edition (1766) of Loefling’s work, 
by Koelpin, in which binomial equivalents are given for Loefling’s three poly- 
nomial species. This use of the name is not valid under the American Code, 
since Fabricius in 17638 (Enum. Pl. Hort. Helmst. ed. 2, 37) had properly 
published a genus Calceolaria based on Cypripedium calceolus of Linnaeus. 
