TILIACE^E. (linden family.) 59 



1. AYENIA, L. 



InvolucL'l none. Calyx 5-partcd. Petals on long capillary claws, connivent 

 over the Btigma. Fertile stamens 5, alternating with 1 -2 sterile ones, their fila- 

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

 5-lobcd, 5-eelled, loculicidally 5-valved, the cells 1 -seeded. — Low shrubby plants, 

 with minute 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, reflcxed in 

 fruit; capsule depressed, muricatc. — South Florida. )\. — Stems 6'- 12' long. 

 Flowers purple. 



2. WALTHERIA, L. 



Involucel 3-leaved, deciduous. Calyx 5-cleft. Petals 5, spatulate, convolute 

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

 Stigma penicillate or tuberculate. Capsule 2-valved, 1-seeded. " 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, serrate, plicate, tomentose on both surfaces ; heads of flowers globose, 

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

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

 Leaves l'-2' lonjr. 



Order 24. TTLIACEiE. (Linden Family.) 



Trees, rarely herbs. Leaves alternate, with deciduous stipules. Flow- 

 ers axillary or extra-axillary, hypogynous, 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 single. Stigma 4-10-lobed. Capsule 2-5-celled, 

 1 - many-seeded. Seeds anatropous. Embryo in the axis of 8eshy albu- 

 men. Cotyledons flat, leafy. 



1. TILIA, Tourn. Lindek. Basswood. 



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

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

 5-celled, with 2 ovules in each cell. Stigma 5-lobed. 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 larpe 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. 



