1(M FAM. 133. 



2. Scapose; — herbs with simple scapes topped by a whorl of digitately 

 compound petioled bracts; flowers inconspicuous, in simple 

 terminal umbels; calyx truncate; petals 5, greenish; ovary 2-3 

 celled; styles 2-3; fruit drupe-like, red or yellowish, - - Panax 



P. quinquefolium, Ginseng. Whorl of 3-4 long-petioled bracts; leaves 5-7 fo- 

 liate; berries bright crimson. Cultivated without success. 



P. excelsum and P. plumatum with ferny leaves, or P. aureum and P. victoriae 



with variegated leaves, are fine house-plants. 

 2. Caulescent; — herbs or shrubs with pubescent or prickly-armed foliage; 

 leaves pinnately or ternately decompound; flowers white or 

 whitish, 5 parted, in racemose or paniculate, or compound um- 

 bels; berries black, --------- Aralia 



A. spinosa, Prickly Ash. Shrub or small tree with large, long-petioled leaves; 

 numerous umbels of flowers in panicled racemes. River-hammock. Sum- 

 mer. 



A. filicifolia with fern-like leaves, A. Guilfoylei with variegated foliage, and 

 A. papyrifera, the Chinese rice-paper plant, with its large leaves belong to this genus. 



133. Ammiaceae (Umbelliferae), Carrot or Parsley Family. 



Herbs with hollow stems and generally alternate, more 

 or less dissected leaves; flowers umbellate, either compound, 

 or the umbels contracted into heads, perfect or polygam- 

 ous; umbel and secondary umbels (umbellets) often sub- 

 tended by an involucre and involucles (bracts and bract- 

 lets); calyx 5-toothed or with a mere border; petals 5 and 

 stamens 5, inserted together on an epigynous disk; ovary 

 inferior; styles 2, often united and thickened below; fruit 

 dry (cremocarp), composed of 2 indehiscent carpels (meri- 

 carps), suspended from a filiform axis (carpophore), and 

 cohering by their inner face (commissure); each with 5 

 primary and often with 4 secondary ribs; the intervening 

 spaces (intervals) usually containing channels (vittae) 

 filled with oil; seeds solitary. 



1. Flowers in simple umbels, or the umbels forming an interrupted ra- 

 ceme; — herbs with creeping stems in damp or wet ground; leaves 

 palmately lobed or peltate; flowers small, white; involucre absent. 

 Early Summer. - _ _ - Hydrocotyle, Marsh Pennywort 



H. umbellata. Leaves peltate, crenate-lobed; umbels many-flowered; fruit 



notched. 

 H. verticillata (interrupta). Leaves peltate, shallowly crenate; umbels few- 

 flowered forming an interrupted raceme; fruit rounded or truncate. 

 1. Flowers in capitate long-peduncled umbels; — herbs with creeping 

 stems in sand or moist pine- land; leaves palmately veined, with 

 long petioles clustered at the nodes; flowers small, white; bracts 

 of the involucre 2-4. Early Summer. - - Centella Pennywort 



C. (Hydrocotyle) repanda. Leaves ovate to cordate, umbels 2-4 flowered. — 

 A form with short petioles is var. Floridana. 



