22 Introduction to Botany. 



VII. ERYTHRONIOM. Dogtooth Violet. Easter Bell. 

 (Gr., Erythroni'on, name of the European purple species; from eryikros, red.) 



Scape bearing a single nodding flower, 2-leaved near tlie ground. 

 Divisions of the perianth lanceolate, spreading or recurved above. 

 Stamens 6, hypogynous, anthers not versatile. Style elongated, thick- 

 ened above, 3-lobed or cleft. Flowering very early in the spring ; bulb 

 cormlike. 



I. Erythronium albidum, Nutt. (L., albidus, whitish.) White Dogtooth 

 Violet. Leaves elliptical oblanceolate, very little or not at all spotted. Flowers 

 white, bluish, or purplish ; parts of the perianth oblong, tapering, recurved. 

 Asexual propagation by oifshoots from the base of the corm. In moist woods and 

 thickets or on prairies. 



•^. Erythronium mesachdrium, Knerr. (Gr., mesos, middle ; chora, land.) 

 Midland Dogtooth Violet. Leaves narrowly oblong, not spotted, from \ 

 to I inch wide. Perianth not recurved nor much spreading. No offshoots from 

 the bulbs. On open prairies. 



VIII. TRILLIUM. Wake-robin. 



(L., triplum, triple, all parts being in threes.) 



Unbranched herbs. Stem rising from a short rootstock and bearing 

 near the summit 3 leaves in a whorl, which subtend the solitary sessile 

 flower. The outer whorl of the perianth of 3 green sepals, inner whorl 

 of 3 white, pink, purple, or greenish petals. Six hypogynous stamens 

 with linear anthers. Ovary 3-celled, styles 3 ; numerous ovules in each 

 cell. 



1. Trillium cemuum, L. (L., cernuus, nodding.) NODDING Wake-ROEIN. 

 Leaves broadly ovate or rhombic, acuminate above, 2 to 7 inches long. Slender 

 stems from 8 to 20 inches high. Peduncle scarcely I4 inches long, recurved; petals 

 recurved. In rich woods. 



.i. Trillium erectum, L. (L,, erectus, erect.) iLL-SCENTED WAKE-ROBIN. 

 Stout stem from 8 to 16 inches high. Leaves sessile or short-petioled. Petals 

 from \ to I2 inches long, ovate or lanceolate. Peduncle ij to 4 inches long, 

 erect or declined. Corolla spreading. In woods. 



3. Trillium grandifldrum, Salisb. (L., grandis, large; flos, fioris, flower.) 

 Large-flowered Wake-robin. Similar to the above, but petals obovate or 

 oblanceolate, from \\ to i\ inches long, white or pink, exceeding the sepals. 

 Peduncles erect or inclined. Rich woods. 



