PAPERS ON LOEANTHACE^. 
491 
brancUets sterile; tbe next joint producing two leat-buds ; tie 2 to 4 foUowing joints bearing flowers, one of which 
is terminal. The usual state probably is, where only the last two joints bear flowers, the ultimate one a terminal, and 
the next below two lateral flowers ; that is the state described by DeCandolle ; “floribus fcemineis ad ramu- _ 
lorum apices tribus ” But in the specimen before me most branchlets bear from 5 to 9 flowers, on the last L214J 
three or four joints, one or two in each axilla. Flowers minute, 0.3 of a line wide and 0.4 long, on very short, 
enclosed pedicels, which apparently are elongated immediately after flowering. Pedicel of the young fruit (ripe fruits 
not seen) half the length of the fruit, 
2 A Americanum, Nutt . : caule ramisc^ue fasciculatis teretibus gracilibus patulis ; squamis truncatis in 
vi-inulas dilatatas cupuliformes connatis; floribus masculis axillaribus terminalibusque nec spicatis. - Oregon, on 
Pinu% Nuttall. — Considerably resembling the slender forms of var. a. of the next spedes, but smaller, sknderer, and 
at once distinguished by the terete branches, the fasciculated branchlets, and much dilated vagmul^. Female plant 
and fruit unknown to me. 
3 A. CAMPYLOPODOM, ». sp. ; ramis oppositis seu dichotomis compresso-quadrangulatis ; squamis truncatis 
bruiser ciispidatis in vaginulas subcylindricas cupuliformes connatis; floribus axillaribus terminalibusque plerumque 
in spicam siiniflicem s. compositam aggregatis, masculis singulis vel binis teniisve, foemmeis in quavM axilla^smgiws^; 
smcas simiilices a'^<^reoatiR. - /3. 1 bbaohyartheon: caule tereti robiisto; ramis robustis articulis abbreviatis diametro 
vix lomdoribus; floribus fcemineis in spicas densas compositas aggregatis. — I have comprised under this name differ- 
ent forms, which, when better known, will probably have to be separated as distinct species. My specimens are so 
incomplete that I cannot even satisfactorily determine whether the different forms which constitute the fiist of the 
two varieties will flnallv be retained under one species. - Var. a. has been found in Oregon (only on Pmm pan W, 
Gew; in New Mexico' (only on Pinus Mis), Fendler, 2S2; and in California, Doimlas. -The. specimens from New 
Mexico (only male and female flowers seen) have short female spikes, bearing 2 to 6 flowers or the flowers are 
scattered on the branchlets : the flowers are elliptical, 0.4 line wide and 0.5 long, almost sessile. Geyers Oregon 
plant (I have seen only a fruiting specimen) has more elongated many-flowered female spikes ; the flowers apparen y 
Late; pedicel hardly one-third the length of the (not quite ripe) fruit. The Calitornian plant (male and female 
flowers and fruit) is much stouter ; male flowers twice as large as in the specimens from New Mexico, ancl not rarely 
4-parted ; female flowers in more elongated spikes, elliptico-orbicular, small, 0.4 to 0.5 line in diameter ; the recurved 
pedicel more than half the length of the fruit, which is 2 lines long and 1.3 wide. ar. 1 3. has been collected m 
Mexico by Coulter. I can hardly doubt it to be a distinct species ; but my meaiis to distinguish it are at present too 
limited. The stout terete stem, the short joints which are hardly longer than wide, the mowded compound or pan- 
icled spikes which resemble those of the following species, and the larger ovate (not elliptical) flowers appear to indi- 
cate spLific distinction. Fem. flowers 0.6 lino wide and 0.8 line long; fruit 2 hues long and 1.2 Imes in transverse 
diameter, the pedicel more than half as long as the fruit : male flowers not seen. 
4. A. CRYPTOPODUM, n. sp. : caule ramisque acute quadrangulatis robustis articulis brevioribus ; squamis trun- 
catis in vaginulas cup ulatas connatis; -floribus in spicas densas compositas congestis, fcemineis ovatis in quavis 
axilla singulis; baccis brevissime incluso-pedicellatis erectis. — Santa Fc, only on Finns brachyptera, A. [215] 
Fendler No 283. — Hooker’s A. Oxycedri from the Hudson Bay country appears to belong here: the figure 
shows at least subsessile, erect fruits; but the segments of the male flowers are broadly oval, while those of the New 
Mexican plant are lanceolate. 
From'the Transactions of the Academy of Science of St. Louis, Yol. HI. 1873. 
Dr. Enaelmann exhibited a living specimen of the Black Spruce (4 bjs nigra) fresh from the Adiron- [Ixxxiii] 
dacks of New York, infected with a diminutive parasite of the mistletoe family, which he htid named Arceu- 
thobiam rmnutum. All the species of this genus inhabit Conifers. One occurs on Junipers in the Medflerranean and 
Caucasus re^nons of the Old World. A second was found by Humboldt on Pines on the highest mountains of Mexico , 
and several more have been found since on our Rocky Mountains and westward, mostly also on Pines. The peculiarity 
of this species, discovered about the same time last summer, by two ditterent persons in different parts of the State of 
New York besides its spring flowering (aU the others being autumnal), consists in the occurrence of the sexes in distinct 
coloni-s in different trees, male and female plants never, thus far, having been found together on the same trees ; and 
in the ureat abundance of individuals on these trees, where the flowering plants almost always occupy the three-year- 
old branchlets, while the two-year-old ones exhibit germinating plantlets like small knots. The necessary inference 
is'that these parasites are propagated, or we should rather say multiplied, by stolon-like fibres, almost analo^us to the 
mycelium of Fungi, spreading under the bark of the growing branches and always from the older to the younger 
