ADDITIONS AND CORRECTIONS 1127 



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base, 5-17 mm. long, serrate on one margin and the upper part of the 

 other, dark-green; invokicre 1 mm. long; appendages crescent-shaped, 

 narrow, crenulate ; capsule nearly 2mm. thick; seeds dark browm, 4-angled 

 with usually 4 cross-ridges. Banks: N. D. Jl. 



546 At the end of the description of Tithymalus read: Seeds mostly pitted. 



548 Before Crlastraceae, insert: 



Family 75a. EMPETRACEAE. CROWBERRY FAMILY. 



Low evergreen undershrubs. Leaves small, jointed to short pulvini, 

 channelled. Flowers monoecious or dioecious or polygamous. Calyx 

 of 3 sepals or none. Petals 2 or 3 or none. Stamens 2-4, the anthers 

 2-celled, longitudinally dehiscent. Pistil 2-several-celled, the styles 

 united, the stigma with As many lobes as the cells. Ovules solitary. 

 Fruit drupe-like, with 1-seeded nutlets. 



1. EMPETRUM L. Crowberry. 



Depressed shrubs with densely leafy branches. Flowers polygamous 

 in the axils of the leaves. Sepals 3, spreading, petaloid. Petals 3. Stamens 3. 

 Ovary 6-9-celled, the stigma with 6-9 toothed lobes. Fruit pulpy with 

 6-9 stones. 



1. E. nigrum L. Leaves linear-oblong, glabrous or puberulent, 4-7 

 mm. long, 1 mm. wide, rough on the revolute margins; flowers purplish; 

 fruit 4-6 mm. thick, globose, black. Bogs: Greenl. — N. Y. — Alta. — 

 Alaska; also Eurasia. Arctic — Subarctic. 

 550 For Anachardiaceae read ANACARDIACEAE. 



555 For C. pubescens (T. & G) Rydb., substitute 5. Ceanothus mol- 

 lissimus Torr., an older name. 



557 After M. crispa insert: 



5. Malva sylvestris L. Biennial; stem erect, 3-4 dm. high, hirsute; 

 petioles long, hirsute; leaf-blades orbicular or reniform, 4-12 cm. wide; 

 lobes 3-7, triangular or ovate; pedicels villous; calyx 5 mm. long; lobes 

 triangular; corolla 2-2.5 cm. long; fruit 7-10 mm. broad. Waste places: 

 Que.— N. D.— Colo.— Mex.— Fla.; nat. from Eur. My-O. 



559 In key, 15th line, for "capsule" read "carpels." 



561 Under S. elata add synonym: Malvastrum datum A. Nels. 



563 Before Hypcricaceae, insert: 



9. HIBISCUS L. Rose Mallow. 



Herbs, shrubs or trees. Leaves digitately veined, dentate or lobed. 

 Flowers perfect, subtended bj^ numerous narrow bractlets. Calyx 5- 

 lobed. Corolla showy. Stamens monadelphous, the column anther- 

 bearing below the entire or 5-toothed naked summit. Styles united; 

 stigmas 5. Fruit a 5-celled loculicidal capsule. Seeds many in each cell. 



1. H. Trionum L. A comparatively low annual; upper leaf-blades 

 3-parted, the divisions lanceolate, the middle one longer; lower leaf-blades 

 5-7-divided, with dentate-crenate divisions; corolla pale yellow with a 

 purple eye, 2.5-6 cm. broad; capsule globose-ovoid, hairy. Waste places and 

 fields: N. S. — S. D. — Kans. — Fla.; Utah; adv. from Eur. Au-S. 



569 Under V. adunca, instead of the synonym V. oxypetala read V. oxy- 

 sepala. Mr. Tidestrom is inclined to admit not only this but T'. re- 

 troscabra and V. Tidestomii as distinct species, a disposition probably 

 well warranted. 



570 To the common names of Nuttallia add: Evening Star. 



