MAXON—STUDIES OF TROPICAL AMERICAN FERNS, 403 
other Swartzian fragments (in the Willdenow Herbarium) have not been seen by the 
writer. 
That Swartz’s original specimens of “ P. myosurotdes’’ probably consisted in small 
part of a second species may be inferred from the presence of the single loose frond 
of P. delitescens found among the ample material of true P. myosuroides by Doctor 
Lindman, and from the mixed fragments of the two species which are preserved as 
authentic material of P. myosuroides at Berlin. It is probable also that Schkuhr’s 
plant came from Swartz. Therefore, Polypodiwm myosuroides Swartz may be regarded 
technically as an aggregate. In this event the very significant species name itself 
must be admitted to indicate unquestionably its application to the plants having 
myosuroid apices (fig. 9). These 
apparently constituted the bulk 
of Swartz’s material. 
As to the three collections of 
Brazilian specimens in the Berlin 
herbarium, referred by Hierony- 
mus to P. myosuroides: Sellow’s 
no. 58 is apparently a small ex- 
ample of the form described by 
Hieronymus as P. strictissimum 
forma major Hieron.; Glaziou’s 
no. 7491 is P. schenckit Hieron., 
as may be seen at once from its 
general form or, at least, from an 
examination of its peculiar rhi- 
zome scales; lastly, Glaziou’s no. 
7480, which is precisely the form 
long ago figured by Raddi,' repre- 
sents either a new species or, more 
likely, a state of P. strictissimum. . Ve 
Further material of this last num- \ i J 
ber is much to be desired. ° a \ \ j 
The only other material cited aa. it 
by Hieronymus under P. tn 
myosuroides is Allers’s no. 234, SMA 
’ 
t 
from German East Africa. This \ ' 
has not been seen by the writer. ; ; . 
. : Fic. 9.—Polypodium myosuroides, from Blue Mountain Peak, 
The accompany1ng illustra- Jamaica ( Mazon 1473). a, Anentire plant; 6, the apex and a 
tions (fig. 9 and pl. 11) will serve section of the sterile portion. a, Natural size; b, scale 2. 
to show the main characters of 
P. myosuroides without further description. Comparative notes will be found also 
under P. delitescens and P. strictissimum. 
The following specimens of P. myosuroides are in the U. 8. National Herbarium: 
Jamaica: Summit of Blue Mountain Peak, alt. 2,220 meters, Mazon 1472, 1473, 
1514; Underwood 1510, Below summit of Sir Johns Peak, altitude about 1,750 
meters, Underwood 3180. Without locality, Hart 70. Also several specimens 
without exact locality, received from the Botanical Department of Jamaica. 
EXPLANATION OF PLATE 11.—Specimensof Polypodium myosuroides from Blue Mountain Peak, Jamaica, 
altitude 2,220 meters. A, Mazon 1514; B, Mazon 1473. Natural size. 
8. Polypodium delitescens Maxon, Bull. Torrey Club 32:74. 1905. PLATE 12. 
Grammitis myosuroides Schkuhr, Krypt. Gewiichs. 1:9. 1804, not Polypodiwm 
myosuroides Swartz, 1788. . 
“ Polypodium myosuroides’’ Jenman, Bull. Bot. Dept. Jamaica IT. 4: 112. 1897, not 
Swartz, 1788. 
1 Pl. Bras. 1: pl. 22 bis. f. 2, 2a. 1825 (as Asplenium serrulatum). 
