1886.] Botany. 553 
The ordinary form of the fertile part of the plant is shown in 
Fig. 1. The sexual organs arise as buds upon a common branch, 
the single antheridium being terminal and decidedly curved; the 
oogonia varying in number from two in the typical form of the 
species to eight or nine in some specimens of the variety. They 
are arranged in a circle about the base of the antheridium (Fig. 
,? 
The specimens when first collected showed no peculiarities, but 
after being kept for a week or two in rather confined quarters, a 
large proportion of the fertile branches developed abnormally, 
owing no doubt to the unnatural conditions in which the plants 
were grown. 
The accompanying figures will show the more peculiar cases 
observed. In all of these it will be seen that the branches that 
under ordinary circumstances would develop into the sexual 
organs are here variously modified. 
In Fig. 2 the antheridium is replaced by a filament that is in 
all respects like an ordinary vegetative filament. 
n Fig. 3 the antheridium is perfect, but the oogonia are re- 
placed by slender filaments. 
ig. 4 one odgonium has developed, but its apex is pro- 
longed into a filament like those in F ig. 3. 
In Fig. 5 the antheridium is complete, but one of the lateral 
buds has developed a secondary branch bearing a complete set of 
Sexual organs, a perfect antheridium and four perfect oogonia. 
_ Fig. 6 shows a case where in addition to the ordinary anther- 
idium two others are developed with accompanying odgonia from 
the lateral buds. 
n Fig. 7 one of ‘the lateral buds has grown out into a filament 
which bears laterally a smaller branch upon which a perfect 
antheridium and oogonium and a rudiment of a second odgonium 
Were formed.— Douglas H. Campbell, Detroit, April, 1886. 
á Botany IN Winter—In connection with the subject of 
Teaching botany in winter,” treated recently, though briefly, in 
the AMERICAN Naturatist, I would like to say a few words. My 
Sophomore class of over fifty members begins its second term in- 
tany the last week in February. The college vacation is during = 
mber, January and most of February. n a 
class has had one term of botany as freshmen in the previous 
“oncerning stems and buds. The first field exercise 
mas the making of a careful drawing of at least three inches of 
