183 



etc. The seeds are also very differently marked from those found on Gantenialan 

 specimens so laheled in the National Herbarium. 

 The type of /*. sicyoides was collected near Jalapa hy Sehiede and Doppe. 



Passiflora suberosa I,. Sp. PI. 2 : 958. 1753. 



Collected hy J. N. Rose in the State of Dnrango, August 15, 1897 (No. 3504), and 

 in the Sierra Madre west of Bolafios, September 15 to 17, 1897 (No. 2946). 



These two collections, although both referred to /'. suberosa, seem to be specifically 

 distinct. 



The latter specimens have deeply 3-lohed leaves, the lobes very much elongated; 

 the former has ovate leaves, but slightly 3-lobod, the lobes ovate. Dr. Masters 

 thinks this is " an extreme form of suberosa, or perhaps distinct." 



SYNOPSIS OF THE NORTH AMERICAN SPECIES OF WALTHERIA. 



Until recently the National Herbarium has possessed but two species 

 of Waltheria, namely, the common W. indica and W, detonsa. Recent 

 botanical activity has brought to light all of the six species listed by 

 Hemsley in the Biologia Central] Americana, except the little-known 

 W. hirsuta, as well as three undescribed species, which are character- 

 ized below. The following key has been constructed after a careful 

 study of the material in the Gray, Donnell Smith, and National Her- 

 baria, and, although it seems reasonably satisfactory, a study of larger 

 collections will doubtless suggest further modifications. 



A. § Stegowai/theria. Stipules large and broad ; style terminal ; capsule, dehiscent by 



a terminal lid. 

 Waltheria operculata Rose, sp. no v. 



Herbs, 3 to I! dm. high, more or less branching, somewhat hairy; leaves oblong, 

 more or less hairy on both sides, somewhat irregularly serrate, acute, 3 to 6 cm. long; 

 petioles 12 to 25 mm. long; stipules obliquely ovate, acuminate, 4 mm. broad at 

 base, 8 mm. long, inflorescence capitate, short-peduncled ; heads bracteate; outer 

 bracts broadly ovate, acute, inner ones narrower; calyx turbinate, 6 mm. high, 

 5-lobed, 10-nerved; lobes acuminate, as long as the tube, clothed with long pilose 

 hairs; petals 5, 7 mm. long, yellow, spatulate, obtuse, slightly sagittate at base, and 

 with slender claws; stamens 5; filaments united to the top; style slender, tapering 

 into a long unbranched appendage; ovary 2-seeded; capsule thin below, but capped 

 with a thick hairy operculum. 



This species belongs to Professor Schumann's section Stegowaltheria, of which 

 there have been hitherto only two species described, both from Brazil. It is perhaps 

 nearest W. bractcosa, but it has differently shaped stipules, narrower and longer- 

 petioled leaves, shorter peduncles, and filaments united to the top. 



Collected by E. W. Nelson between Tapana, State of Oaxaca, and Tonala, State 

 of Chiapas, altitude 200 to 500 feet, August 1 to 3, 1895 (No. 2876). 



AA. $ Euwaltiikkia. Stipules filiform; style lateral; dehiscence of capsule loculieidal. 



a. Leaves thin, acuminate, sharply serrate, soon glabrate. 



Waltheria acuminata Rose, sp. nov. 



Stems shrubby; leaves broadly ovate, acuminate, cordate at base, somew T hat 

 irregularly serrate, 10 to 12.5 em. long, including the petiole (2.5 to 3 cm. lougj, 

 nearly glabrous, or the petioles more or less stellate-pubescent; flowers in small 

 axillary or terminal clusters on short peduncles; calyx turbinate but somewhat 

 5-angled, strongly 10 nerved, densely stellate-pubescent; lobes 5, half as long as the 

 tube, ovate, acute; petals 5, obtuse, wedge-shaped, tapering into a slender claw, 



