Genus i. 



ARUM FAMILY. 



443 



3. Arisaema Stewardsonii Britton. 

 Stewardson Brown's Indian Tur- 

 nip. Fig. 1 1 13. 



Arisaema Stewardsonii Britton, Man. Ed. 2, 1057. 

 1905. 



Leaves 2, or 1 in the case of small plants, 

 i°-2j° high, 3-foliolate, the segments lanceo- 

 late to ovate-lanceolate, erose-crenulate, ' shin- 

 ing, acuminate at the apex, narrowed at the 

 base, 1Y-8' long, 1-3' wide, sessile or nearly 

 so; spadix 1Y-2' long, the upper portion cylin- 

 dric ; spathe green or striped, the lower portion 

 fluted, the apex rather long-acuminate; berries 

 shining, 4"-$" in diameter, forming an ovoid 

 head over 1' in diameter. 



In wet woods, often among, sphagnum, moun- 

 tains of Pennsylvania and New Jersey. Reported 

 from New England. Juhe-Aug. 



4. Arisaema Dracontium (L.) Schott. Green Dragon. Dragon-root. Fig. 11 14. 



Arum Dracontium L. Sp. PI. 964. 1753. 

 Arisaema Dracontium Schott, Melet. 1:17. 1832. 



Corms clustered. Leaves usually solitary, 8'-4° 

 long, pedately divided into 5-17 segments, much longer 

 than the scape; segments obovate or oblong, 3'-io' 

 long, 9"-4' wide, abruptly acute at the apex, narrowed 

 to a sessile or nearly sessile base, entire or the lateral 

 ones somewhat lobed; scape sheathed by membranous 

 scales at the base ; spathe greenish or whitish, narrowly 

 convolute, acuminate, 1-2' long, enwrapping the spadix, 

 the upper part of which tapers into a slender appendage 

 exserted 1-7' beyond its apex; inflorescence of the 

 staminate plant nearly as long as the tubular part of 

 the spathe; in the monoecious plant the pistillate 

 flowers are borne on the lower part of the spadix; 

 ovary turbinate, with 6-8 bottle-shaped ovules ; stigmas 

 depressed ; berries reddish-orange in large ovoid heads. 



Mostly in wet woods and along streams, but sometimes 

 in dry soil, Maine to Ontario and Minnesota, south to 

 Florida, Kansas and Texas. May-June. 



2. PELTANDRA Raf. Journ. Phys. 89 : 103. 1819. 



Bog- herbs, with entire sagittate acute or acuminate leaves, the long petioles sheathing 

 the shorter scape at the base. Spathe elongated, convolute, or expanded above. Flowers 

 monoecious, covering the whole spadix. ' Perianth none. Staminate flowers uppermost, 

 consisting at first of irregularly 4-sided oblong flat-topped shields, from the edges of which 

 appear 6-10 imbedded anthers opening by apical pores, the shields ultimately shrivelling 

 and leaving the linear-oblong anthers nearly free. Ovaries ovoid, surrounded at base by 4 

 or 5 white fleshy scale-like staminodia, i-celled ; ovules solitary or few, amphitropous ; style 

 erect, short, thick, tipped with a small stigma. Fruit a green or red berry, 1-3-seeded, when 

 ripe forming large globose heads at the extremity of the finally recurved scape, and enclosed 

 in the persistent leathery base of the spathe. Seeds surrounded by a tenacious jelly; endo- 

 sperm none. [Greek, referring to the shield-shaped staminate disks.] 



The genus consists of two species, the following one being the type ; the other inhabits marshes 

 and springs from North Carolina to Florida. 



