TILIACE^. (lINDKN FAMILY.) 59 



1. AYENIA, L. 



Involuccl none. Caly.K .^-parted. Petals on long capillary claws, connivent 

 over the stigma. Fertile stamens 5, alteniating with 1-2 sterile ones, their fila- 

 ments united into a pedicellate cup. Style single. Stigma 5-angled. Capsule 

 5-lobed, .5-celled, loculieidally 5-valved, the cells 1-seeded. — Low shrubby plants, 

 with mmute axillary flowers. Capsule rough. Albumen none. 



I. A. pusilla, L. Stems mostly simple, prostrate, downy; leaves (4"- 

 8' long) roundish or oblong, coarsely serrate; peduncles solitary, reflexed in 

 fruit ; capsule depressed, murieate. — South Florida. IJ. — Stems G' - 12' long. 

 Flowers [iurj)le. 



2. WALTHERIA, L. 



Invo'.uccl 3-leaved, deciduous. Calyx .5-cleft. Petals .5, spatulate, convolute 

 in the bud. Stamens 5, united below. Ovary 1-cellcd, 2-ovuled. Style single. 

 Stigma penicillate or tuberculate. Capsule 2-valved, 1-seeded. Embryo in the 

 a.xis of fleshy albumen. — Herbs or shrubs, with alternate leaves, and small flow- 

 ers in a.xillary clusters. 



1. W. Americana, L. Stem erect, villous ; leaves ovate or oblong, acute 

 or obtuse, sen-ate, plicate, tomcntose on both surfaces ; heads of flowers globose, 

 stalked, or subsessile and shorter than the petioles, tlic upper ones often spiked ; 

 calyx hirsute ; flowers yellow. — South Florida. — Stem 2° - 3° high, rigid. 

 Leaves l'-2' long. 



Order 24. TILTACE/E. (Lixden Family.) 



Trees, rarely liorbs. Ivcaves alternate, witb deciduous stipules. Flow- 

 ers axillary or extra-axillary, hypogynous, polyandrous. Sepals 4-5, 

 valvate in tlie bud, deciduous. Petals 4-5, convolute or imbricated in tbe 

 bud. Stamens distinct or united in clusters: anthers 2-cclled, tbe pollen 

 grains smooth. Style single. Stigma 4-10-lobod. Capsule 2 -5-celled, 

 1 - many-s(X'ded. Seeds anatropous. Embryo in the a-\is of fl^.~hy albu- 

 men. Cotyledons flat, leafy. 



1. TILIA, Toum. Linden. Basswood. 



Sepals 5. Petals 5, imbricated in the bud. Stamens numerous, united in 5 

 clusters, with a jtetal-like ajipendage (sterile stamen) opposite each petal. Ovary 

 5-eelled, with 2 ovules in each cell. Stigma 5-Iobed Capsule 1-celled, 1-2- 

 seeded. — Trees, with cordate leaves, and several-flowered axillary peduncles, 

 which are connate below with a large ligulate veiny bract. Flowers cream-color. 



1 . T. Americana, L. Leaves smooth and green on both surfaces, ob- 

 liquely cordate or truncate at the base, sharply serrate. — Mountains of Georgia 

 and northward. June. — A large tree. LeaA-es 4'-5' wide. 



2. T. pubescens. Ait. Leaves hoary -tomentose on both surfixces, becom- 

 ing smoothish above, obliciuoly truncate at the base, mucronate-serrate. — Rich 

 soil, Florida to North Carolina, and westward. June. — Leaves 4' - 5' wide. 



