WEST INDIAN GRASSES DESCRIBED BY SWARTZ. 139 
Panicum rigens are not the same as the plant in his own herbarium. The specimen at 
Florence is J. rigidifolia. The specimen from the general herbarium at Stockholm, 
which was seen by me at Halle, is Panicum acuminatum Sw. The specimen at Berlin 
I think is the same as the original at Stockholm, though it has longer leaves, the blades 
being 6 cm. or more long: but, as in the case of the other, the surface of the blades is 
scabrous to the touch as described by Swartz. There are some points in Swartz’s 
description which lead one to think that he had seen /sachne rigidifolia. He says, 
in the more extended description in his Flora,@ ‘‘Gramen rigiditate peculiare.”’ But 
in the original diagnosis in the Prodromus he states that the leaves are scabrous, 
which applies to his specimen, but not to Isachne rigidifolia. Swartz’s type at 
Stockholm is well matched by Fendler no. 1637 from Venezuela (U. S. National 
Herbarium no. 822538). 
Panicum fuscum Sw. Prod. 23. 1788. 
The type specimen is marked “PP. fuscum Flor. ind. occ. Jamaica, Swartz.’’? The 
panicles are small and compact like those of P. chartaginense Sw., and the spikelets 
are like those of 7. fasciculatum Sw., but slightly larger. A good match for this is 
Maxon no. 2361 from Jamaica. It should be considered a synonym of 2. fascicu- 
latum. 
Panicum laxum Sw. Prod. 23. 1788. 
The type specimen is marked “ P. lavum fl. ind. oce. Jamaica. Swartz.’’ It belongs 
to this species as usually described. Synonyms are: P. agrostidiforme Lam. 1791, type 
at Paris marked ‘lam. ill. gen. ex D. Richard;” P. tenuiculmwm Meyer, 1818, portion 
of type in the herbarium of Trinius at St. Petersburg marked ‘Prim. FI. Esseq.,” 
sent by Meyer; P. diandrum Kunth, 1829, type in the Berlin herbarium, collected 
in Guadaloupe by Balbis (the second specimen cited by Kunth, Rio Janeiro, col- 
lected by Gaudichaud, is also in the Berlin herbarium); P. ramuliflorum Hochst. 
in Steudel, Syn. Pl. Glum. 1854, type in the herbarium of Steudel at Paris. This 
last specimen is also marked Agrostis nigrescens Salam. and is from Bahia. Steudel’s 
cited specimen, Kappler Pl. Surin. no, 1523 is the same species (fide specimens seen 
in various herbaria, such as those of Munich and Leipzig). 
Panicum flavescens Sw. Prod. 23. 1788. 
The type specimen is marked ‘‘P, flavescens fl. ind. occ. Jamaica. Swartz.”’ It is 
the same as P. fasciculatum, The panicle is somewhat more open, but the branches 
of the panicle are slender, about 8 cm. long, resembling in this respect the specimen 
of P. fascieulatum rather than that of P. fuscum, but nearly devoid of bristles. The 
spikelets are brownish, strongly reticulated, slightly exceeding 2 mm. in length. 
Panicum flavescens as described by Grisebach® and by Hooker ¢ is very different, 
being a species of the section Ptychophyllum, 
Panicum diffusum Sw. Prod. 23. 1788. 
The type specimen is labeled ‘“‘diffusum fl. ind. occ., 
as generally understood. 
”) 
and belongs to that species 
Panicum oryzoides Sw. Prod. 25. 1788. 
The type specimen labeled “2. oryzoides fl. ind. occ. Jamaica. Swartz.”’ is the same 
as P. zizanioides H. B. K. (1815), which name must be used on account of Panieum 
oryzoides Ard, Animad. Spec. Alt. 16. 1764, 
Panicum pallens Sw. Prod. 25. 1758. 
The type specimen marked ‘‘P, pallens fl. ind. occ.’ 
Munro, 
is Ichnanthus pallens (Sw.) 
a@Fl. Ind. Oce. 1: 154. 1797. ¢ Fl]. Brit. Ind. 7: 56. 1896. 
bF]. Brit. W. Ind. 547. 1864. 
35023—voL 12, pr 3—OS 3 
