334 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
2. POINCIANA L. Brrp-OF-PARADISE FLOWER. 
1. Poinciana gilliesii Hook. Bot. Misc, Hook, 1: 129. pl. 34. 1830, 
Caesalpinia gilliesti Wall. Bot, Misc. Hook. 1: 129. 1830. 
Type Locality: ‘ Prope Rio Quarto et Rio Quinto, et apud La Punta de San Luis, 
Abundat circa Mendozam, Americae Meridionalis.”’ 
An ill-smelling, erect, sparingly branched shrub with green stems 2 to 3 meters 
high; leaves large, bipinnate, with very numerous small leaflets; inflorescence of 
terminal racemes of large yellow flowers with long-exserted, bright red stamens and 
pistil. It is one of the commonest ornamental plants in gardens, especially in the 
southern part of the State and is frequently escaped. 
3. CASSIA L. Senna. 
Shrubs or herbaceous perennials with abruptly pinnate leaves and rather large 
yellow flowers; calyx lobes 5, obtuse; petals 5, nearly equal; stamens 10, the upper 3 
abortive, the anthers opening by terminal pores; pods slightly compressed, elongated, 
several-seeded. 
KEY TO THE SPECIES. 
Shrub with leaflets 5 mm. long or less...............-.-.--.---- 1. C. wislizent. 
Herbs with leaflets 20 mm. long or more. 
Leaves 2-foliolate. 
Leaflets lanceolate, 30 to 50 mm. long, bright green.... 4. C. roemeriana. 
Leaflets oblong, 25 mm. long or less, grayish........... 5. C. bauhinioides, 
Leaves 6 to many-foliolate. 
Plants glabrous; leaflets lanceolate, acute............. 2. C. leptocarpa. 
Plants pubescent throughout; leaflets oblong, obtuse. 
Leaflets more than 3 pairs, oblong to ovate; pubes- 
cence coarse, spreading; pods 5 cm. long or 
more, obtuse................0..0..---0--6- 3. C 
Leaflets 2 or 3 pairs, mostly oblong-obovate; pubes- 
cence fine and close; pods 3 cm. long or less, 
acute.......--..-..2 00 eee eee ee eee eee eee 6. C. covesit. 
1. Cassia wislizeni A. Gray, Pl. Wright. 1: 60. 1852. 
Type Locauity: ‘Carrizal and Ojo Caliente, south of El Paso,’’ Chihuahua. 
Rance: New Mexico and Arizona to Mexico. 
New Mexico: Southern Grant and Luna counties. Dry hillsides and plains, in 
the Lower and Upper Sonoran zones. 
2. Cassia leptocarpa Benth. Linnaea 22: 528. 1849. 
Type Locatity: ‘Ad Zapativa legit Pohl et prope Rio Janeiro.” 
RanGeE: Texas to Arizona, south into Mexico and South America. 
New Mexico: Near White Water ( Mearns 343). 
3. Cassia lindheimeriana Scheele, Linnaea 21: 457. 1848, 
TYPE LOCALITY: New Braunfels, Texas. 
Rance: Western Texas to Arizona. 
New Mexico: Florida Mountains; Organ Mountains; Guadalupe Mountains. Dry 
rocky hills, in the Upper Sonoran Zone. 
. lindheimeriana. 
4. Cassia roemeriana Scheele, Linnaea 21: 457. 1848. 
Type Locauity: “Auf felsigem Boden am obern Guadeloupe,’’ western Texas. 
RanGE: Western Texas and southern New Mexico to Mexico. 
New Mexico: Hurrah Creek; Tierra Blanca; Ruidoso Creek; Roswell; Knowles; 
Queen; Lincoln; Causey. Lower and Upper Sonoran zones. 
