OP ARTS AND SCIENCES. 140 



AcALYPHA FLAVKSCKNS. A slirub 5 to 10 feet high, the young 

 branches ami petioles somewhat pubescent: leaves thin, S-o-nerved, 

 ovate to ovate-lanceolate, rounded at base, acuminate, serrate, very mi- 

 nutely puncticulate and finely rough-puberulent, 3 to 4 inches long on 

 petioles 1 to I,]- inches, on the short fruiting branchlets smaller and 

 nearly sessile ; stipules rigidly setaceous from a broad base : si)ikes 

 sessile, 1 to 1^ inches long, the staminate axillary, dense, the pistillate 

 terminal and rather loose ; bracts small, 1-flowered, thin and loose, 

 broadly renifbrm, many-nerved, 7-tootlied, the teeth attenuate above: 

 styles sparingly pinuatifiil ; ovary densely pnbescent. — Jn Tamasopo 

 Canon, San Luis Potosi ; June, 1890 (n. 3073). Kear A. carpinifolia 

 as grouped by Mueller. 



AcALYPHA (LiNOSTACHYs) LONGiPES. Suffrutescent, the young 

 herbaceous branches sparsely pubescent : leaves thin and glabrous or 

 slightly hispid on the nerves, 3-5-nerved at base, oblong-lanceolate to 

 lanceolate, acuminate, subcordate at the narrowed base, serrulate, 1 or 

 2 or sometimes 4 inches long, on pedicels 1 to 9 lines long; stipules 

 attenuate-subulate : staminate spikes axillary, sessile, 3 or 4 inches 

 long ; pistillate racemes pedunculate, axillary, very slender, 2 to 5 

 inches long, the pedicels solitary or in paiis and unequal, the longer 

 1 to 12 lines long; bracts minute: ovary densely muricate. — On 

 limestone ledges in Tamasopo Canon, San Luis Obispo; June, 1890 

 (d. 3082). 



Sebastiania Pringlei. a glabrous shrub with slender branches, 

 dioecious or the sterile ameuts with sometimes (?) a pistillate flower at 

 base : leaves rather thin, on short slender petioles, from elliptical and 

 obtuse to lanceolate and acute or short-acuminate, rounded or sub- 

 cuneate at base, eglandular, obsoletely crenate-serrate, 9 to 18 lines 

 long : spikes terminal, nearly sessile ; staminate bracts" very short, 

 broad and abruptly apiculate, 2-flowered ; flowers nearly sessile, dian- 

 drous ; calyx of 1 to 3 minute distinct linear acuminate sepals : distil- 

 late spike 2-flowered, the upper flower usually retarded in development 

 or abortive; bract thicker, biglandular : capsule glabrous, 4 lines long, 

 chartaceous, dehiscing dorsally and ventrally ; seed not seen. — In 

 rocky gulches at San Jose Pass, San Luis Potosi ; July, 1890 (n. 3136, 

 distributed as Gymnanthes Pringhi). An evidently closely related 

 species, but with much larger leaves, recently collected by Dr. Palmer 

 near Alamos in Sonora, has nearly globose seeds with a very minute 

 caruncle. The presence of this caruncle has determined the reference 

 of the present species to the genus Sehrtstinnia, with which in other 

 respects the characteis accord very satisfactorily. Some specimens 



