61 



species. It is also closely allied to the following tropical species, 

 L. znllosiis, L. siparhis, L. sparsibavbis, L. pyramidatiis. The 

 following table will aid in distinguishing the different species : 



Pileus with two kinds of hairs, lanate and rigid. i. 



Pileus not as above. 2. 



I. Pileus yellowish tan-colored, slightly umbilicate. Z. pulcherrimus. 



1. Pileus orange, deeply umbilicate. L. siparius B. & C. 



2. Hairs of pileus in pyramidal fascicles. L. pyraviidalus B. & C. 

 2. Hairs of pileus fascicled toward center, 



scattered and depressed. L. sparsibarbis B. & C. 

 2. Hairs of pileus not fascicled. L. villous Klotsch 



David R. Sumstine. 



WlLKINSIiUKG, Pa. 



A NEW Species of Evolvulus from Colombia. — The follow- 

 ing new .species was detected among the specimens of Evolviihis 

 in the National Herbarium at the time the three Mexican species 

 described by the writer * were studied : 



Evolvulus sericatus sp. nov. 



§ Alsinoidei. Stems herbaceous from a perennial root, erect, 

 3—5 dm. tall, slender, usually branching above ; stem silky- 

 hirsute with appressed hairs ; leaf-blades sessile or the petioles 

 less than i mm. long, narrowly oblong-lanceolate, usually 

 broadest near the middle, 1—2 cm. long, about one-third as wide, 

 rounded or -obtuse at the base, the apex obtuse and submucro- 

 nate, densely and finely appressed silky-villous above, more 

 densely so beneath, both the lower and the upper leaves some- 

 what reduced ; peduncles exceeding the subtending leaves, 1.5— 

 2.5 cm. long, 3— 9-flowered, bracts subulate, long-tipped, about 

 2 mm. long ; pedicels 6—8 mm. long ; sepals ovate-lanceolate, 

 acuminate, 3-3.5 mm. long, densely silky-pubescent with sub- 

 appressed hairs, the tips erect in fruit ; corolla nearly rotate, 

 6—7 mm. broad, entire, blue with white plicae, the plicae hirsute 

 without ; capsules globose, 2-valved, 4-seeded ; seeds glabrous, 

 dark-brown, minutely roughened. 



Colombia : Papagayeras, 800 m. alt., E. Langlasse, no. 12 , 

 November 4, 1899. Type in the herbarium of the United 

 States National Museum. 



Related to E. zdllosiis Ruiz & Pav., from which it differs by its 



* Bull. Torrey Club 33 : 315-317. 1906. 



