122 
PROCEEDINGS OF THE ACADEMY OF 
ACROGENS. 
LYCOPODIACE^. 
Lycopodium were not visibly affected. Large plants of L. WUldenovii, L. 
ccesium arboreum, and L. umbrosum were within a short distance of the green- 
house door. 
Selaginella. About twelve species were in the orchid house, none of which 
were affected. 
POLYPODIACE^. 
In a collection embracing nearly one hundred and fifty species of foreign and 
tropical Ferns, and comprising many hundred seedlings within the pots of 
orchids and other plants, no special change was observable. In some instances 
they became slightly yellow in the fronds, but their growth and health were 
not affected. 
ENDOGENS. 
ARACEiE. 
Caladium. a fine plant of C. pictum was killed. It withered to the root at 
once, and never recovered. 
Philodendron was not affected. 
Dieffenbachia. a plant of Z). seguina picta was very slightly affected. 
PANDANACE^. 
Pandanus. Several fine specimens of P. Javanicus fol. variegat. in the hot- 
house were killed. The foliage became yellow, and withered, and the plants 
soon died. A plant of P. graminifolius, also in the hothouse, was much injured, 
lost a part of its leaves and recovered slowly. Several plants of P. Javanicus 
fol. vor. in the orchid house were not injured. 
PALMACE^. 
Ghamoerops Jmmilis became yellowish and sickly for some weeks, but did not 
lose its foliage, and gradually recovered, 
Ph(ENix dactylifera was not affected. 
BROMELIACEiE. 
Aechmea, Billbergia, Pitcairnia, Veiesia, Tillandsia, Dyckia, Melinonia, 
Pourretia, Puya. With the exception of Puya Altensteinii, which turned 
yellowish for a few weeks, no perceptible change was apparent in any of the 
Bromeliacese. A large number of individuals of this family were growing in 
the hot and orchid houses. 
H^MODORACE^, 
Barbacenia Rogierii was not sensibly affected. 
AMARYLLIDACEiE. 
Amaryllis, Brunsvigia, Crinum, H-s;manthus, Hymenocallis, Alsteomeria. 
The greater number of bulbs, being dry and at rest, were not affected. Such as 
were in leaf, including Crinum amabile, showed yellow leaves, but were not 
otherwise injured. 
Agave. Several specimens of A. Americana and A. variegata changed 
color. Their leaves turned yellowish, assuming a somewhat flaccid appearance. 
They recovered gradually through the spring. 
IRIDACE^. 
Dietes, Witsenia, were not affected. Ixia lost the flowers, 
MUSACE^. 
Heliconia angustifolia turned somewhat yellow, but soon recovered, 
[May, 
