TILIACEiE. (lIXDKX J-AMILT.) 59 



1. AYENIA, L. 



Involuccl none. Calyx 5-partc(l. Petals on long capillary daws, connivent 

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

 ments united into a pedieellate cup Style single. Stigma .5-angle(l. Capsule 

 .5-lobed, 5-celled, loculicidally .'i-valvcd, the cells 1-seeded. — Low shrubby plants, 

 with minute axillary flowers. Capsule rough. Albumen none- 



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

 8" long) roundish or oblong, coarsely serrate; peduncles solitary, rcflexed in 

 fruit; capsule depressed, muricate. — Soutli Florida, y. — Stems 6'- 12' long. 

 Flowers purple. 



2. WALTHERIA, L. 



Involucel 3-lcaved, deciduous. Calyx .5-clcft. Petals .5, spatulatc, convolute 

 in the bud. Stamens .'j, united below. Ovary 1 -celled, 2-ovulcd. Style single. 

 Stigma penicillatc or tubcrculate. Capsule 2-valved, 1-secded. Embryo in the 

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

 ers in axillary clusters. 



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

 or obtuse, senate, plicate, tomentose on both surfaces ; heads of flowers globose, 

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

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

 Leaves 1 ' - 2' long. 



OuDicu 24. TILTACEiE. (Lixdex Family.) 

 Trees, rarely lierbs. I^oaves alternate, with deciduous stipules. Flow- 

 ers axillary or extra-axillary, hypog}nous, polyandrous. Sepals 4-5, 

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

 bud. Stamens distinct or united in clusters : anthers 2-celled, the pollen 

 grains smooth. Style sinjrle. Stigma 4 - 1 0-lobed. Capsule 2 - 5-celled, 

 1 -many-seeded. Seeds anatropous. Embryo in the axis of fleshy albu- 

 men. Cotyledons flat, leafy. 



1. TILIA, Toum. Linden. B.vsswood. 



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

 clusters, with a p tal-like appendage (sterile stamen) opposite each petal. Ovary 

 .5-celled, with 2 ovules in each cell. Stigma 5-lobcd 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. Leaves 4' -5' wide. 



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

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

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



