Plants Collected in Paraguay. 163 



Asclepias campestris, Dosne., 1. c, 566. 



Luque (333). December. 



The petals of this species are greenish in the centre and white on 

 the margins, thrice as long as the sepals, Teflexed. Corona purplish 

 in tint. Leaves entire, opposite, glabrous, elliptical, 6-8 cm, long, 

 2-3 cm. wide, nearly or quite sessile. Flowers 20 or more in the 

 umbel. Fruit not seen. 



Asclepias CurassaTica, L., Sp. PL, 215. 



Asuncion (47). November. 



A beautiful species, reminding one of our A. tuberosa, which it 

 much resembles in the color of its flowers. Common in copses 

 around Asuncion. Flowers in small umbels, petals red and the 

 hoods and gynostegium bright orange. It flowers nearly the whole 

 season from November to April. Fruit a follicle much like that of 

 A. incarnata. 



Asclepias mellodora, St. Hil., PI. Rem. Bres., 227. 



Caballero (603). January. 



A low species with white flowers in large umbels. On the rail- 

 road track at Caballero and on the campo in the vicinity. The 

 leaves are numerous, lanceolate, opposite, entire, slightly pubes- 

 cent, acuminate, rounded at base, 10-12 cm. long, 1-3 cm. wide, 

 nearly or quite sessile. Umbels numerous and very conspicuous 

 when in flower. Follicles very similar to those of no. 47. 



Ditassa bumilis, Morong, n. sp. 



Many-branched from the base, suffruticose, from thick, ligneous roots. 

 Stems very slender, 8-15 cm. high, grayish pubescent. Leaves opposite, 

 entire, ovate, acute or acuminate and mucronate at the apex, truncate or 

 more or less cordate at base, sparsely hispid on either side, hispid ciliate and 

 more or less recurved on the margins, the pairs decussate, slightly overlapping 

 each other, 6-15 mm. long, 3-5 mm. wide; petioles about 2 mm. long. Flowers 

 white, 4 or 5 mm. high, in small umbels, 2-4 in the umbel, axillary or supra- 

 axillary; peduncles 2-5 mm. long; pedicels 5 or 6 mm. long. Sepals subu- 

 late, somewhat longer than the tube of the corolla, hispid. Corolla deeply 

 5-parted, the lobes lanceolate, acuminate, 3 or 4 mm. long, hispid outside, 

 glabrous within. Scales of the corona much longer than the gynostegium, 

 muticous, the inner and outer ones about the same length. Apex of the 

 stigma protuberant. The sepals are more or less but not conspicuously 

 glandular in the axils. Pollinia as long as the glands ; caudicles minute. 

 Sepals and corolla lobes erect. 



