ENGELMANN—NORTH AM. SPECIES OF JUNCUS. 429 
The proportion of stamens and sepals, and of anthers and 
filaments, is often _~ eee: ut in some species they 
vary very much, as may be seen in-/. scirpoides, the different 
forms of which bear stamens of different length and anthers 
of different size without exhibiting other characters of sufli- 
cient — value. 
e form of J. Remerianus I find both cireles of 
rene suppressed or rather undeveloped and in a rudiment- 
ary state, so that those plants become uni-sexual. Correspond- 
Filaments are always pres e species they are 
very short, in others elongated, in all dilated at base, and, at 
least in the hexandrous ones, mor less united. Thei 
pistil, after fecundation remains attached to the base of the 
sepals, 
The shape of the anthers is of slight importance; they are 
longer or shorter, linear or oblong, in some species pointed 
or cuspidate, in most others obtuse or emarginate, more or 
less sagittate at base, but these characters show little con- 
ane 
Pistil—The pistil exhibits great differences in its form and 
furnishes good and ge enerally constant characters. The ovary 
is obtuse or acute, gradually or abruptly elongated into the 
style; this organ is often very short but in many species it 
in any other species. The stigmas are longer or shorter than 
the ovary with the style, oe (except in Juncedlus) three 
in number, very slender and more or less twisted ; in J. acutus 
they are short and thick, megs in SE stygius, as already Lin- 
neus remarks, short and recurved. In just expanding flowers 
the length of the stamens is often equal to that of the ovary 
and style together, so that the stigmas only emerge from 
between the anthers, or they are equal to the ovary alone 
when the whole style with the stigmas protrudes over the 
anthers. 
Capsule—The capsule is diagnostically one of the most 
important organs in Junci. It varies from globose to ovate, 
et) 
or longer than the sepals or equal to them; but all these 
characters vary within certain limits, in some species more 
than in others, and only the examination of a large number 
of anges can olan about their constancy and value in a 
give oe The capsale is always three-valved (excepting 
again Juncellus), opening into the cells, the valves beari 
on their se line the placentw either immediately (parie- 
