174 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VOL. 13, No. 9 
written “Pipt. punctatum P de Beauv. Roem. et Schult. II 328?” 
The specimen belongs to Eriochloa punctata (L.) Desv. 
ACICARPA, a new genus with a single species. 
49. ACICARPA SACCHARIFLORA, pl. 1. f. 4. No locality is given. 
Milium hirsutum Beauv. pl. 5, f. 5., and Sloane Hist. Jam. 1: 43. pl. 
14, f. 2. are cited. The specimen consists of two panicles and four 
leafy shoots of Valota insularis (.) Chase. The Beauvois and Sloane 
figures cited also represent this species. 
AGROSTICULA, a new genus with a single species. 
51. AGRosTICcULA MURALIS. pl.1.f.2. “In veteribus muris prope 
Rio-Janeiro.”’ The specimen consists of a tuft with mature panicles 
half the length of the entire plant. The species belongs in Sporobolus, 
S. muralis (Raddi) Hitche. & Chase, as described in the Grasses of the 
West Indies.78 
59. AIRA BRASILIENSIS. ‘In veteribus muris prope Rio Janeiro.” 
No specimen of this could be found. The description agrees in every 
way with the plants referred by Hackel!® to Sporobolus brasiliensis 
(Raddi) Hackel, based on Aira brasiliensis Raddi. Other specimens 
representing this species are Sellow, Brazil, the type collection of Era- 
grostis atroides Nees, and Hassler 11560, Paraguay. This species is 
peculiar in having a second floret in about half the spikelets of most 
of the specimens. Because of these 2-flowered spikelets it has been 
placed in Eragrostis, but the lemmas are 1-nerved, not 3-nerved as in 
Eragrostis. 
ARUNDINELLA, a new genus with a single species. 
60. ARUNDINELLA BRASILIENSIS. pl. 1. f. 3. “In collibus apricis 
prope Rio Janeiro.”” No specimen of this could be found. Raddi’s 
figure of the spikelet indicates unmistakably the genus recognized 
under this name. The description points to the common species of 
Brazil, A. hispida (Willd.) Kuntze (Andropogon hispidus Willd. 1805), 
to which it has been generally referred. 
NAVICULARIA, a new genus including three species, the third of which, 
N. lanata, being figured, is taken as the type. The three species 
belong in Jchnanthus Beauv. (1812). 
Raddi says the genus is distinguished by the peculiar and constant 
structure of the spikelet, which has three valves of the corolla as well 
as three of the calyx. The three valves of the corolla are the fertile 
lemma, its well-developed wings (characteristic of the genus Jchnan- 
thus) and the palea; the three valves of the calyx, the two glumes and 
the sterile lemma. 
18 Contr. U. 8. Nat. Herb. 18: 368. 1917. 
19 Bull. Herb. Boiss. II. 4%: 278. 1904. 
