GENUS i. 



LINDEN FAMILY. 



4. Tilia Michauxii Nutt. Michaux's Bass-wood. 

 Fig. 2846. 



T. alba Michx. f. Hist. Arb. Am. 3: 315. 1813. Not L. 

 T. Michauxii Nutt. Sylva, Ed. 2, 92. 1842 



A forest tree, sometimes 90 tall, the bark broadly 

 furrowed, or that of the branches smooth and silvery 

 gray Leaves firm in texture, 9' long or less, serrate, 

 whitish-pubescent beneath, the apex acuminate, the base 

 usually very oblique; floral bracts spatulate, attenuate 

 toward the base and decurrent on the peduncle to above 

 its base ; staminodes' spatulate ; petals light yellow, 3"-$" 

 long ; fruit ovoid or globose, 4" -7" long. 



In rich soil, Connecticut to Ohio, Georgia, Kentucky and 

 Alabama. June-July. 



Family 85. MALVACEAE Neck. Act. Acad. 

 Theod. 2 : 488. 1770. 



MALLOW FAMILY. 



Herbs or shrubs (sometimes trees in tropical regions) with alternate mostly 

 palmately-veined leaves. Stipules small, deciduous. Flowers regular, perfect, 

 often large, rarely dioecious or polygamous. Sepals 5 (rarely 3 or 4), more or less 

 united, usually valvate; calyx often bracted at the base. Petals 5, hypogynous, 

 convolute, often contorted. Stamens oo, hypogynous, monadelphous, forming a 

 central column around the pistil, united with the bases of the petals ; anthers 

 i -celled. Ovary several-celled, entire or lobed; styles united below, distinct above, 

 and generally projecting beyond the stamen-column, mostly as many as the cells 

 of the ovary; ovules i or several in each cavity. Fruit capsular (rarely a berry), 

 several-celled, the carpels falling away entire or else loculicidally dehiscent. Seeds 

 reniform, globose or obovoid ; embryo curved ; cotyledons large, plicate or condu- 

 plicate ; endosperm little, or copious. 



About 45 genera and 900 species, widely distributed in tropical and temperate regions. 

 Stamen-column anther-bearing at the summit ; carpels in a circle around a central axis. 

 Carpels i -seeded. 

 Flowers perfect. 



Involucels of 6-9 bractlets. i. Althaea. 

 Involucels of 1-3 bractlets, or none. 



Stigmas linear, on the inner side of the style-branches. 



Carpels beakless ; petals obcordate. 2. Malva. 



Carpels beaked ; petals truncate. 3. Callirrhoe. 

 Stigmas capitate, terminal. 



Seed ascending. 5. Malvastrum. 



Seed pendulous. 6. Sida. 



Flowers dioecious. 4. Napaea. 

 Carpels 2-several-seeded. 



Involucels none. 7. Abutilon. 

 Involucels of 3 bractl'ets 1 . 



Carpels continuous. 8. Phymosia. 



Carpels septate between the seeds. 9. Modiola. 

 Stamen-column anther-bearing below the entire or 5-toothed summit ; fruit a loculicidal capsule. 



Carpels i -seeded. 10. Kosteletzkya. 



Carpels several-seeded. n. Hibiscus. 



i. ALTHAEA L. Sp. PI. 686. 1753. 



Tomentose or pilose herbs, with lobed or divided leaves, and axillary or terminal, solitary 

 or racemose, perfect flowers. Involucels of 6-9 bractlets united at the base. Calyx 5-cleft. 

 Petals 5. Stamen-column anther-bearing at the summit. Cavities of the ovary numerous, 

 i-ovuled; style-branches the same number as the ovary-cavities, stigmatic along the inner 

 side; carpels numerous, indehiscent, i-seeded, arranged in a circle around the axis. Seed 

 ascending. [Ancient Greek, signifying to cure.] 



About 15 species, natives of the temperate and warm parts of the Old World, the following 

 typical. 



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