Mosoiiatel Family. 69 



June; infrequent; Winneshiek, Clayton, Fayette, Delaware, and Scott coun- 

 ties. (S. puheiiH Mx.) 



VIBURNUM L. Small trees or shrubs, with simple leaves, and white 

 flowers in compound cymes. Calyx small, persistent, 5-toothed. Corolla 

 rotate, deeply 5-lobed, segments obtuse. Stamens 5. Stigmas 1-3, sessile. 

 Fruit a 1-celled, 1-seeded drupe. Petioles frequently minutely stipulate. 



V. lentago L. Sweet, VUiunmm. Sheep-berry. Shrub or small tree, 8-30 feet 

 high; leaves ovate, long-acuminate, closely and sharply serrate, with long 

 margiped petioles; cymes 3-5 rayed, sessile; drupes oval, half inch long, ripe 

 in autumn, edible. Woods; May-June; frequent throughout the state. 



V. prunifolium L. Black Haw. Similar to the preceding-; leaves oval, ob- 

 tuse or acutish. finely serrulate, bow woods; May-June; rare; Johnson 

 county, reported from Humbolt county. 



V. pubescens (Ait.) Pursh. Downy-leaved Arrow-wood. Shrub 2-3 feet 

 high; leaves ovate to oblong-ovate, short acuminate, broadly dentate, pin- 

 nately veined, downy when young, base cordate, short-petioled or nearly ses- 

 sile; drupe dark purple, oval; stone flattish, slightly 3-grooved on both sur- 

 faces. Rocky woods; May-June; infrequent; Emmet, Fayette. Johnson, 

 Henry, Decatur, Story, and Cerro Gordo counties. A form of this species 

 with the characteristic fruit but the petioles a half inch or more long is found 

 in Johnson county. The forms referred to the next species may belong here. 



V. dentatum L. Arrow-wood. A shrub. 4-10 feet high; branches slender, 

 glabrous, gray; leaves ovate, oval or orbicular, acute' or short-aeuminate, 

 coarsely dentate, both sides glabrous or pubescent in the axils of the veins 

 beneath, base rounded or slightly cordate, petioles one-fourth of an inch to an 

 inch long, glabrous; drupe globose-ovoid, blue, becoming blackish; stone 

 deeply grooved on one side, rounded on the other. Woods; May-June; infre- 

 quent; forms have been referred to this species from Jackson, Delaware, 

 Johnson, Henry, Winnebago, and Dallas counties. 



V. opulus L. Cranberry-tree. Wild Oaelder-rose. Shrub 5-12 feet high; 

 leaves deeply 3-lobed, 3-ribbed, broadly ovate, base rounded or truncate, 

 lobes acuminate, dentate, entire in the sinuses; petioles stipuled. and with 2 

 glands above; drupes globose or oval, red, acidic, stone orbicular, flat, not 

 grooved. Woods; June-July; rather rare; Allamakee and Delaware counties, 

 reported from Fayette county. 



ADOXACEAE Fritxch. Mosoiiatel Family. 



Dwarf perennial herbs, with scaly or tuberous rootstocks, basal and 

 opposite ternately divided leaves, and capitate cluster of greenish flow- 

 ers. Calyx-limb of 3 or more tpfeth. Corolla rotate, 4-6-lobed. Stamens 

 of 4-6 pairs, in the sinuses of the corolla, separate or partly united; 

 anthers peltate, 1-celled. Style 3-5-rjarted. Fruit a greenish d rU pe, 

 with 3-5 cartilaginous nutlets. Represented by the monotypic genus 

 Adoxa L. 



A. moschatellina L. Musk-root. Moschatel. Smooth, 3-5 inches high, 

 radical leaves 1-4, ternately compound, long-petioled; cauline leaves a single 

 pair, 3-parted or 3-eleft; flowers greenish or yellowish, 4-5 in a slender pedun- 

 culate glomerule. Rocky woods; May; rather rare; Winneshiek county, re- 

 ported from Fayette and Floyd counties. 



