104 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VOL. 13, NO. 6 
Achene not contracted at apex; pappus of 2 awns only........ 1. Narvalina. 
Achene contracted into a neck or collar at apex. 
Pappus of about 6 to 15 awns, more or less distinctly aggregated in two 
groups over the angles of the achene................... 2. Ericentrodea. 
Pappus of 2 awns and a turbinate corona.................. 3. Cyathomone. 
1. Narvalina Cass. Dict. Sci. Nat. 38: 17. 1825. 
Needhamia Cass. Dict. Sci. Nat. 34: 335. 1825. Not Needhamia R. Br. 1810. 
1. NARVALINA DOMINGENSIS (Cass.) Less. Syn. Comp. 234. 1832. Fig. 1, a. 
Needhamia domingensis Cass. Dict. Sci. Nat. 34: 336. 1825. 
Narvalina fruticosa Urban, Symb. Antill. 5: 265. 1907, excluding Bidens 
fruticosa L., the name-bringing synonym.? 
TYPE LocaLiry: Santo Domingo. 
SPECIMENS EXAMINED: Hartt: Shrub 5 to7 ft. high, occasional in arid thick- 
ets, vicinity of Pétionville, alt. 350 m., June, 1920, Leonard 4832 (U.S. Nat. 
Herb.); shrub 4 to 5 ft. high, scarce, vicinity of Fond Parisien, Etang 
Saumatre, May, 1920, Leonard 4098 (U.S. Nat. Herb.). 
2. Ericentrodea Blake & Sherff, gen. nov. 
Seandent shrubs or herbs (?), with opposite, petiolate, ternate or biter- 
nately divided, coriaceous leaves and cymose-panicled, discoid or radiate, 
yellow heads; involucre double, as in Bidens, the outer phyllaries small, 
herbaceous, the inner submembranous, lineate; receptacle flattish; pales 
flattish, membranous, lineate; rays when present pistillate, fertile; disk 
flowers: hermaphrodite, the corollas tubular, with slender tube, funnelform 
throat, and 5 short teeth; anthers with cordate-sagittate bases and ovate 
terminal appendages; style exserted, the branches short, with triangular, 
acuminate, papillose appendages; achenes strongly obcompressed, the obovate 
body distinctly or obsoletely 2-winged, coarsely ciliate on the lobulate margin, 
contracted at apex into a short neck or collar; pappus awns about 6 to 15, 
fragile, in two groups of 3 to “8” over the angles of the achene, those of each 
group usually more or less connate at base, with 2 or 3 shorter intermediate 
awns sometimes present on each side of achene between them. 
Type species Narvalina corazonensis Hieron. 
Heads radiate, in fruit about 1.7 em. thick, 9 mm. high (corollas not included) ; 
lower leaves ternate, the upper simple............. 1. E. corazonensis. 
Heads discoid, in fruit about 1 em. thick, 6 mm. high (corollas not included) ; 
lower leaves biternate, the upper ternate or simple. 
Heads with 20 or more flowers; lower leaves biternate, the terminal 
divisions unlobed; pedicels up to 3 em. long.......... 2. HE. homogama. 
Heads about 12-flowered; lower leaves biternate, the terminal segments 
trilobate; pedicels about 1 cm. long................. 3. EL. mirabilis. 
1. Ericentrodea corazonensis (Hieron.) Blake & Sherff. Fig. 1, 6. 
Narvalina corazonensis Hieron. Bot. Jahrb. Engler 29: 49. 1900. 
SPECIMEN EXAMINED: Ecuapor: Subandine woods, Mount Corazon, alti- 
tude 2,000 meters, Sodiro 44/2 (fragments of type coll.; U.S. Nat. Herb. no. 
1,059,379). 
2. Ericentrodea homogama (Hieron.) Blake & Sherff. Fig. 15) 74 
Narvalina homogama Hieron. Bot. Jahrb. Engler 29: 48. 1900. 
2 See Blake, Journ. Bot. Brit. & For. 53: 13-14. 1915. 
3 The floral characters are drawn from material of 2. mirabilis. 
—— ss Se 
