LIBRARY 

 NEW YORK 

 BOTANICAL 



Family 5. TROPAEOLACEAE 



By George Valentine Nash 



Twining or spreading, annual or perennial, sometimes tuberous, herbs, 

 with usually peltate leaf- blades which are angled, lobed, or dissected, and axil- 

 lary 1-flowered peduncles, or the flowers rarely in umbels. Flowers irregular, 

 perfect, the hypanthium produced posteriorly into a spur. Sepals 5, imbricate 

 or valvate, connate at the base. Petals 5, rarely fewer by abortion, imbricate, 

 the upper ones exterior and more or less dissimilar to the lower, and, on 

 account of the posterior enlargement of the hypanthium, at some distance from 

 the stamens. Stamens 8, free, unequal, declinate. Ovary 3-lobed, 3-celled ; 

 style single, apical, filiform, the branches short, introrsely stigmatic. Ovule 

 solitary, pendulous from the apex of the cell. Fruit with the carpels persistent 

 a short time, and then separating from the axis, indehiscent, indurated-fleshy, 

 wrinkled. Seed without endosperm ; cotyledons thick-fleshy ; hypocotyl very 

 short. 



1. TROPAEOLUM L,. Sp. PI. 345. 1753. 

 Characters of the family. 

 Type species, Tropaeolum inajus L. 

 Petals entire, or at the most crenate. 1. T. pendulum. 



Petals not entire. 



All the petals serrate or somewhat lobed, the teeth or lobes running out 

 into cilia ; spur straight. 

 Lower petals ciliate also on the claw ; leaf-blades nearly orbicular, en- 

 tire or slightly sinuate-lobed. 2. T. Morilzianum. 

 Lower petals not ciliate on the claw ; leaf-blades lobed. 



Leaf-blades with the sinuses acute, the apex of the lobes, especially 



that of the middle one, emarginate. 3. T. (marginatum. 



Leaf-blades with the sinuses obtuse, the apex of the lobes not 

 emarginate. 

 Flowers about 26 mm. long ; upper petals obovate-cuneate, with 8 



-10 teeth. 4. T. bimaculatum. 



Flowers about 37 mm. long; upper petals round-oval, with about 

 5 teeth. 5. T. Warscewiczii. 



Upper petals lobed, the lobes obtuse, rarely acute, not bearing cilia ; spur 

 hooked at the apex. 6. T. peregrinum. 



1. Tropaeolum pendulum Klotzsch, Allg. Gartenz. 18 : 377. 1850. 



A climbing glabrous plant, not tuberous. Stems moderately stout ; stipules wanting ; 

 leaf-blades peltate, semicircular-reniform, slightly 5-lobed, the lobes mucronate ; peduncle 

 shorter than the petiole, pendulous ; spur cylindric-subulate, straight or somewhat curved, 

 about 1.5 cm. long; sepals ovate; petals yellow, cuneate, crenate at the apex, the upper 

 marked with red lines and violet spots, the lower with a long claw. 



Type locality : Central America. 



Distribution : Central America; also in Colombia (fide Buchenau). 



2. Tropaeolum Moritzianum Klotzsch, Allg. Gartenz. 6 : 241. 1838. 



Tropaeolum Funckii Turcz. Bull. Soc. Nat. Mosc. 31 1 : 425. 1858. 



A climbing glabrous annual. Leaves distant; stipules wanting ; petiole long; blade 

 peltate, slightly 7-lobed when mature, the young ones distinctly lobed, truncate at the base, 

 4.5-9 cm. long, 5-10 cm. broad, the lobes rounded at the apex, mucronate, the mucro aris- 

 ing from a small yellow spot ; peduncle 8 cm. long or more ; spur 2-2.5 cm. long, straight, 

 spreading, fawn-colored, narrowed toward the dirty-green apex ; sepals 8-12 mm. long, 



Volume 25, Part 2, 1910] 89 



