82 Contributions from the Gray Herbarium 
GUATEMALA: Barranca de Fuerengo, Oct. 1865, Bernoulli 105 
(K). — T. 2. Fic. 59. — The flowers are described by Bennett and 
Chodat (from F. Mueller 302, Orizaba, the type, in herb. Mart.) 
as subsessile, but the pedicels in all the specimens above cited are. 
.2-1.5 mm. long and thus the longest of any species in the series. 
Nevertheless their agreement in all other points with the descrip- 
tions and Chodat’s figures is so close that I have little hesitation in 
following Watson in referring the specimens quoted to this species. 
101. P. spHAEROCEPHALA Chod. Annual, 5-6 em. high, simple 
or corymbosely branched above. Cotyledons and basal leaves op- 
posite, broadly spatulate, 3 mm. long, 2.5 mm. wide; leaves once 
or twice verticillate below, the others alternate, 5-6 mm. long, 0.6— 
1.5 mm. wide, those of the branches few and smaller. Racemes 
terminal, capitate, 4.5-5 mm. thick, on naked peduncles 7-10 mm. 
long; flowers 1-1.3 mm. long, on pedicels less than 1 mm. long. 
Upper sepal broadly ovate, the lower ovate-lanceolate, acuminate. 
Wings broadly lance-elliptic, obtuse or subacute, 3-nerved, exceed- 
ing the corolla. Keel with a few-lobed crest. Upper petals broadly 
rhomboidal, obtuse. Capsule elliptic. Seed ovoid, sparsely hairy. 
Aril less than half as long as seed, its lobes spatulate. — Chod. Bot. 
Jahrb. lii. Beibl. 115. 80 (1914), as P. sphaerocephalum. — Not 
seen; described by Chodat from Seler 1222, from Patzcuaro, 
Michoacan. 
102. P. rurama Rose. Fleshy perennial, many-stemmed, the 
stems procumbent, whitish-green, angulate, glabrous, 1-3 dm. long. 
Leaves verticellate throughout in 5’s, or a few uppermost scattered, 
spatulate-obovate, mucronate at the rounded apex, cuneate to 
base, thick, fleshy, barely petioled, glabrous, 7-24 mm. long, 3.5-10 
mm. wide. Racemes 1.5-(at last)9 cm. long, 5 mm. thick, straight 
or curved, densely flowered, on peduncles 1.7-4.7 cm. long; pedi- 
cels 0.5 mm. long or less. Flowers pinkish, 2.5-2.8 mm. long. 
Upper sepal orbicular-ovate, obtusish, 1.5 mm. long, the lower del- 
toid-ovate, obtuse, 1.3 mm. long, each marked with 4 oblong 
whitish glands. Wings obovate, short-clawed, rounded at apex, 
5-nerved, 2.8 mm. long, 1.5 mm. wide. Keel 2 mm. long; crest of 
3 pairs of lobes, the posterior flabellate-cuneate, the anterior 2 
oblong, entire or barely bifid. Upper petals elliptic, rounded or 
subtruncate at apex, barely erose on margin, 1.9 mm. long. Cap- 
sule orbicular-ovate, 1.4 mm. long, 1.2 mm. wide. Seed short- 
