1918] SCHNEIDER—SALIX 15 
Sect. III. BonpraNnDIANAE Schn., sect. nov.—Sect. Amyc- 
DALINAE And. in K. Sv. Vet.-Akad. Handl. 6:19 (Mon. Salic.). 1867, 
pro parte; in DC. Prodr. 16%:200. 1868, pro parte.—Arbores vel 
frutices alti. Folia mediocra vel satis magna, pleraque anguste 
vel late lanceolata vel elliptico-lanceolata, adulta crasse papyracea, 
superne non stomatifera. Amenta coetanea vel serotina, mascula 
brevi-pedunculata vel rarius sessilia, cylindrica, interdum satis 
longa, densi- vel sublaxiflora, floribus pleiandris, staminibus 
3-7(-11), antheris pl. m. globosis, glandulis 2, saepe lobulatis vel 
partitis et pseudodiscum formantibus rarius distinctis dorsali inter- 
dum parva; amenta feminea pleraque longius pedicellata, fructi- 
fera saepe elongata, pleraque densiflora; ovaria longe (rarius 
breviter) pedicellata, glabra vel (saltem partim) pilosa;  styli 
breves vel brevissimi, stigmatibus satis brevibus clausis vel emargi- 
matis; glandula una ventralis, saepe lata, truncata et satis crassa, 
interdum basim pedicelli subamplectens.? 
The species united by me in this section form a very distinct 
group of the American PLEIANDRAE. They are closely related 
among each other, but well separated from the other sections of 
the PLEIANDRAE either in America or in the Old World. In some 
respects they somewhat resemble the species of sect. TETRASPERMAE 
And. sensu SCHNEIDER in Sargent, Pl. Wilson 3:93. 1916, but I 
am far from assuming that there may be a close relationship between 
those two sections. A main difference between the species of 
sect. BONPLANDIANAE and most of the other American PLEIANDRAE 
is the complete absence of stomata in the upper surface of the 
* With regard to these glands the following is to be said. In SarGEnt, Silva 
N. Am. 9:120. 1896, we find the statement that S. Bonplandiana (var. Toumeyi) has 
a “cup-shaped disk,” and that it is the only willow of the United States with a cuplike 
Besides this, SARGENT says that this disk “is not represented in ANDERSSON’S 
ee (Mon. Salic. pi. r, fig. 14), but in ANDERSSON’s fig. 14, d the disk is well shown. 
elerring to the figure given in S (pl. 472), Torprrer (Osterr. Bot. Zeit. 54:175- 
1904) says that there is in S. Bonplandi “ein volll becherférmiger Torus, wie 
bei der Gattung Populus.” ‘This is, however, not the case. After having investigated 
ret flowers of the specimens mentioned above, I find that there is only a large and 
road ventral gland which sometimes almost entirely encircles the base of the pedicel, 
but mostly there is a distinct lack of a dorsal gland. The very same conditions may 
— ed in specimens of the typical S. Jongipes Shuttl. from Florida. The broad, 
Prise cing ventral gland is very rarely nearly cup-shaped and somewhat similar 
to the cuplike torus of Populus. 
