584 CASSIACEAE 
Corolla apparently papilionaceous: leaves with 1-folioliate blades. 1. CERCIS. 
Corolla more or less irregular, sometimes nearly regular: leaves with pinnately 
compound blades. 
Leaves with simply pinnate blades. 
Corolla essentially regular, the 5 petals nearly equal: calyx-lobes obtuse. 2. CASSIA. 
Corolla very irregular, one of the lateral petals (standard) and the lowest 
petal large, the other 3 petals often greatly reduced: calyx-lobes acu- 
minate. 3. CHAMAECRISTA. 
Leaves with 2-pinnate blades. 
Flowers dioecious or polygamous. 
Flower with a very small receptacle: stamens surpassing the petais: 
vod leathery. 4. GLEDITSIA. 
Flower with a long receptacle: stamens shorter than the petals: pod 
woody. 5. GYMNOCLADUS. 
Flowers perfect. 3 8 i ae 
Leaf with a very short petiole which ends in a spine, each division with $ 
. PARKINSONIA. 
a long flat phyllode-like rachis. 6 
Leaf with a relatively long petiole, the rachises of the divisions not 
phyllode-like. 
Shrubs or trees. 
Calyx-lobes valvate. 
Armed shrubs or trees: leaf-divisions with few leaflets. 7. CERCIDIUM. 
Unarmed trees: leaf-divisions with very many leaflets. 8. DELONIX. 
Calyx-lobes imbricated. 
Pods smooth. 9. POINCIANA. 
Pods prickle-armed. 10. GUILANDINA. 
Herbs. 11. HOFFMANSEGGIA. 
1. CERCIS L. 
Unarmed shrubs or small trees, with a scaly bark. Leaves alternate, deciduous, 1- 
foliolate: leaflet with a simple entire long-petioled blade. Flowers perfect, in axillary 
clusters or racemes on the branchlets of a previous year. Sepals united into a campanu- 
late 5-lobed calyx which is swollen on one side and lined with a thin disk in the bottom. 
Corolla pink or rose: petals 5, nearly equal, clawed : standard smallest: wings obliquely 
truncate: keel-petals somewhat auricled on one side. Stamens 10, in 2 rows: filaments 
distinct, conspicuously enlarged and pilose below the middle, those opposite the petals 
shorter: anthers versatile, opening lengthwise. Ovary short-stipitate, oblique. Ovules 
anatropous. Pods narrow, very flat, leathery, 2-valved, the ventral suture with 2 narrow 
wings. Seeds flat, transverse, with a reddish brown crustaceous testa. Endosperm horny. 
The plants flower in the spring. RED-BUD. JUDAS-TREE. 
Blades of the leaflets not acuminate: pods sessile or nearly so. 1. C. occidentalis. 
Blades of the leaflets manifestly acuminate: pods manifestly stipitate. 2. C. Canadensis. 
1. Cercis occidentalis Torr. A slender small tree, sometimes 12 m. tall, with gla- 
brous foliage. Blades of the leaflets suborbicular varying to reniform, 4-12 cm. in diameter, , 
rounded or obtuse at the apex, cordate, lustrous above ; petioles stout, much shorter than 
the blades: pedicels 1.5-2 cm. long, or sometimes shorter: calyx 3-4 mm. long; lo! 
acute or acutish, much shorter than the tube: corolla similar to that of the following 
species: pods linear-oblong, 6-9 cm. long, acuminate at both ends, sessile or nearly so. 
In valleys, Texas and northern Mexico. Spring. 
2. Cercis Canadénsis L. A shrub or small tree rarely 15 mm. tall, with glabrous 
or sometimes pubescent foliage. Blades of the leaflets suborbicular in outline varying to 
broadly ovate or reniform, 6-12 cm. in diameter, acuminate at the apex, somewhat ]ustrous 
above, truncate or cordate at the base ; petioles shorter than the blades: pedicels slender, 
0.5-1.5 em. long: calyx 3-4 mm. high; lobes rounded, shorter then the tube: corolla 
pco ; standard with an oval blade, 7-8 mm. long; keel petals concave, about ] em. 
ong: pods linear-oblong, 5-10 cm. long, acuminate at both ends, short-stipitate, often 
glaucous. ` 
In rich soil, Ontario to Minnesota, New Jersey, Florida and Texas. Spring. 
2. CÁSSIA L.! 
Herbs, shrubs or trees, various in habit, with evenly pinnate leaves, and mostly yellow 
flowers in terminal or axillary panicles or racemes. Petiole often with one or seve 
glands borne near the base or between the leaflets. Calyx-lobes 5, obtuse, somewhat 
leathery. Petals 5, spreading, nearly equal, imbricated. Stamens 5 or 10, all perfect or 
the 3 upper ones reduced to staminodia: filaments unequal: anthers opening by ap! 
1 Contributed by Mr. Charles Louis Pollard. 
