96 BULLETIN 13S0, ■ U. S. DEPARTMENT OF AGRICULTURE 
under side with a conspicuous ferruginous-furfuraceous band extending 
almost its entire length. 6 to 10 centimeters long, 3 to G centimeters 
broad ; petioles 0.05 to 1 centimeter long, smooth except for the con- 
tinuation of the brown band of the nerve ; flower spikes solitary, rarely 
two in the axds of the leaves, simple, slender, terete, ferruginous fur- 
furaceous throughout. 4 to 6 centimeters long; flowers 6-parted, greenish 
to blood red, 2 to 3 millimeters long, ridged, bud shaped and acute be- 
fore unfolding, two to three together, sessile on a short 3-bracteolate 
peduncle, bracts acuminate; calyx inconspicuous, slightly undulate: petals 
acute; stamens attached to the middle of the petals; filaments short, 
broad: anthers lobed, acuminate: style corrugated at point of contact 
with anthers, stigma short : fruit oblong cylindric, green with yellow 
apex, later reddish orange with yellow tips. 5 to 6 millimeters long. 
Common on Hevea brasiliensis at Urucurituba, Rio Madeira. Democracia, 
Sao Jose de Amatory. Amazon River, Guajara Mirim, and Rio Mamore. 
It was also found parasitic on Dendrophthora poeppigii, the common 
leafless mistletoe of Hevea, and on orange and lime growing under Hevea. 
Type in 1 nited States National Herbarium (No. 1,199,132). 
P. pyrifolia (II. B. K.) Eich. Monoecious; branches erect, terete, younger 
parts conspicuously flattened, edges of younger parts and the nodes fur- 
furaceous, ferruginous, the rest glabrous: leaves ovate to oblong lanceo- 
late, rather thick and coriaceous, smooth, distinctly veined, lower part 
of middle nerve and petiole streaked with brown tomentum; flower 
spikes solitary in the axils of the leaves, simple terminal ones rarely 
paniculate, terete to subquadrangular at the base, furfuraceous ferru- 
ginous throughout. -1 to 8 centimeters long: flowers small, red or purple- 
red, three together, sessile or subsessile on short bracteblate peduncles; 
fruit greenish ;i 1 base, saffron or lemon yellow at tips, later entirely so, 
oblong. .1 to 6 millimeters long. Found on Hevea brasiliensis at Riber- 
alta. Bolivia. The most common host was Inga sp.. with which the 
Hevea tree was closely associated. Also collected on Mangifera indica, 
lime, and cacao. The species is similar to P. pl&ty&ada Tie, but the flowers 
of the latter are described as yellowish green. 
ALGiE ON HEVEA 
Cephaleuros mycoidea Karst.— presumably C. virescens Kunze. 
C. virescens Kunze. Thallus of more than one layer of cells attached to the 
substratum by means of rhizoides, covered with a thin cuticle which 
ruptures with the development of the sporangia. Sporangiophores variable, 
numerous, septate, sparingly tilled with an orange-colored substance 
(hematochrome). On leaves, Amazon region. The genus' ami species 
were established by Kunze in 1827 in a set of exsiccati and referred to the 
fungi. His specimens came from Dutch Guiana (Surinam). 
C. parasiticus Karst. Thallus, of more than one layer of cells, parasitic in the 
tissues of the host, developing under the epidermis and invading the nies- 
ophyll; sporangiophores variable, numerous, septate, filled with reddish 
yellow hematochrome. On leaves of Hevea guyanensis, Amazon region. 
Mycoidea parasitica Cunn. Has been referred to Cephaleuros virescens by 
some authors. 
