104 



POPULAR FLORA. 



ers scattered in a long and naked slender spike; calyx greenish, 4-parted; stamens 5; styles 2, 

 bent dt)\vn in fruit. Thickets. P- Viryinianum. 



H_ H_ Somewhat climbing, or supported by recurved sharp prickly bristles on the strong angles of the 

 stems, &-C.; flowers white or flosli-color in small racemes or heads; root annual. The prickly 

 angles cut like a saw, whence the plants are called Tear-Thumb. 



11. Ahuow-lkaved K. Leaves arrow-shaped (Fig. 100), short-stalked; akene 3-angled. P. sagiuiilum. 



12. IIaluehd-leaved K. Leaves balberd-shaped (Fig. 102), long-stalked ; akene flattish. Low 

 grounds. P- ari/olium. 



^_ -I- 4- Twinhig annuals, with smooth stems and greenish or whitish flowers in paniclcd racemes; 



leaves heart-shaped and partly halberd-shaped. 



13. Climbing K. Smooth, climbing high over shrubs, &c. ; racemes leafy; 3 of the calyx-lol)es more 

 or less winged in fruit. Thickets in low ground. P. dumctbrum. 



14. Bindweed K. Low, stems roughish ; racemes corymbed; three of the calyx-lobes ridged in the 

 middle. Cult, and waste grounds. P. Convolvulus. 



80. LAUREL FAMILY. Order LAURACE^E. 



Trees or slirubs, with spicy bark and leaves ; the latter marked with transparent dots 

 under a magnifying-glass, alternate and simple ; the calyx of 6 petal-like sepals. Stamens 



9 or 1 2 on the very bot- 

 tom of the calyx ; the 

 anthers opening by up- 

 lifted valves. Pistil sim- 

 ple, with a one-celled 

 ovary, in fruit forming 

 a berry or drupe, one- 

 seeded. Flowers gener- 

 ally polygamous or dioe- 

 cious in spring. — A very 

 well-marked family, most- 

 ly in hot countries, but 

 we possess two or three 

 representatives. 



484. Sterile flower of Sassafrag. 455. Fertile flower of tlie same. 48S Migiiifiert slinien, 

 with two £lnnd -• -Al \he base, lite anther opetniigl'v two hrge and two small valve-^ ■\'^7 Pi^ii't 

 with llie ova' y divided to sliow the ovule hanging i'roni tlie'tup. 488. Leaf and cluster of fruit. 

 489. Lower half of fmit, cut across. 



Flowers perfect : stamens 9, with good anthers, and 3 sterile ones. Tree, with entire 



oblong leaves; common South, [Persca] Red-Bay. 



Flowers dioecious or nearly so, greenish-yellow: stamens 9, about 3 of them with yel- 

 low glands at the base of the filaments (Fig. 486). 

 Anthers 4-celled and 4-valved. Tree: flowers in stalked corymbs, appearing with 



the leaves; some of the latter 3-lobed, (S(t:ssafras) Sassafras. 



Anthers 2-celled and opening by a single valve to each cell. Shrub; flowers in ses- 

 sile clusters, appearing earlier than the entire leaves, {Benzoin) Spiceb-ush. 



