254 ERICACEAE. (HEATH FAMILY.) 



4 3. PIERIS, Don. Corolla ovoid-oblong or cylindraceous : j -.laments slender and 

 awl -shaped, appendaged with a spreading or recurved bristle on each side at or below 

 the apex: anthers oblong, awnless : sutures of the b-anc/ular pod with a more or less 

 tluckentd line or ridge, which often falls away srf)anii<-ly u:/tat the pod opens : seeds 

 turned in all directions, oblong, with a thin and rather loose reticulated coat : flowers 

 in umbel-like clusters variously arranged. 



3. A. Mariana, L. (STAGGER-BUSH.) Nearly glabrous ; leaves decid- 

 uous, but rather coriaceous, oval or oblong, veiny ; flowers large and nodding, 

 in clusters from axillary scaly buds, which are crowded on naked branches of 

 the preceding year; sepals pretty large, leaf-like, deciduous with the leaves. 

 Sandy low places, Rhode Island to Virginia near the coast, and southward. 

 May, June. Shrub 2 -4 high : foliage said to poison lambs and calves. 



(A. NfriDA, Bartram, the FETTERBUSH, belongs to this group, and may 

 grow in S. Virginia.) 



t 4. LY6NIA, Nutt. Calyx 5-cle/l: corolla globular, pubescent: filaments and 

 anthers destitute of awns or appendages: pods prominently ribbed at the sutures, the 

 ribs at length separating or separable: seeds slender, all pendulous, with a hose and 

 thin cellular coat : flowers small, mostly in clusters which are racemose-panicled: 

 Bracts minute and deciduous : leaves pubescent or scurfy beneath. 



4. A, ligTUStrilia, Muhl. Leaves deciduous, not scurfy, smoothish when 

 old, obovate-oblong varying to oblong-lanceolate ; flowers racemose-panicled on 

 branchlets of the preceding year. Swamps and low thickets, N. England along 

 the coast to Virginia, and southward. June, July. Shrub 4 - 10 high. 



11. OXYDENDRUM, DC. SOHREL-TREE. SOUK WOOD. 



Calyx without bractlets, of 5 almost distinct sepals, valvate in the bud. CV>rol- 

 la ovate, 5-toothed, puberulcnt. Stamens 10 : anthers fixed near the base, linear, 

 awnless, the cells tapering upwards, and opening by a long chink. Pod oblong- 

 pyramidal, 5-ccllcd, 5-valvcd ; the many-seeded placenta; at the base of the cells. 

 Seeds all ascending, slender, the thin and loose reticulated coat extended at both 

 ends into awl-shaped appendages. A tree with deciduous, oblong-lanceolate 

 and pointed, soon smooth, serrulate leaves, on slender petioles, and white flowers 

 in long one-sided racemes clustered in an open panicle, which terminates the 

 branches of the season. Bracts and bractlets minute, deciduous. Foliage sou; 1 

 to the taste (whence the name, from o^us 1 , sour, and SsVSpoi/, tr). 



1. O. arborcillll, DC. (Andromeda arhorca, L.) Rich woods, from 

 Penn. and Ohio southward, mostly along the Alleghanies. June, July. Tree 

 40 -60 high. Leaves in size and shape like those of the Peach. 



12. CL.ETIIRA, L. WHITE ALDER. SWKET PKITKRIH-SH. 



Calyx of 5 sepals, imbricated in the bud. Corolla of 5 distinct obovate-oblong 

 petals. Stamens 10, often exserted : anthers inversely arrow-shaped, inverted 

 and reflsxed in the bud, opening by terminal pores or short slits. Style slender, 

 8-clcft at the npcx. Pod 3-valved, 3-celled, many-seeded, enclosed in the calyx. 

 Shrubs, with alternate and serrate deciduous leaves, and white flowers in termi 



