STANDLEY TREES AND SHRUBS OF MEXICO. 557 



glabrous above, densely spreading-pilosuloiis on the veins beneath and sparsely 

 so on surface ; flowers unknown ; capsule glabrous, about 6 mm. thick ; seeds 

 4 mm. long. 



Distinguished from Trichilia parvifoUa C. DC, the only otlier Mexican 

 species with 3-foliolate leaves, by the shape and pubescence of the leaflets. 



Trichilia sciiiedeana C. DC. in DC. Monogr. Phan. 1: G64. 1878. Closely 

 allied to Trichilia karwinskyana C. DC. and T. hirta L. No specimens have been 

 examined, and the status of the species is uncertain. Type from Veracruz. 



3. GUAREA Allem. ; L, Mant. PI. 2: 150. 1771. 

 Reference : C. De Candolle in DC. Monogr. Phan. 1 : 542-579. 1878. 

 Leaves abruptly pinnate ; panicles axillary, sometimes borne on the older 

 wood ; calyx 4 or 5-tcothed, rarely 5-sepaled ; petals 4 or 5 ; filaments connate 

 into a denticulate tube, the sessile anthers borne inside the tube at apex ; ovary 

 4 or 5-celled ; seeds usually large, pseudo-arillate by the separable inner pericarp. 

 Guarea trichilioides L., a West Indian species which has been reported incor- 

 rectly from Mexico, is said to have poisonous juice^ which acts as a violent 

 emetic and purgative. The following names have been reported from Mexico 

 for plants of the genus whose specific identity is doubtful : " Guaraguao " ; 

 " cedrillo Cimarron " (Tabasco); " trementino " (Tabasco). 

 Ovary more or less pubescent. 



Leaflets 1 to 3 pairs; petals 4, 6 mm. long or less; ovary 4-celled, the ovules 

 solitary. 



Panicles about equaling the leaves 1. G. rovirosae. 



Panicles much shorter than the leaves. 

 Ovary densely strigose throughout ; style sparsely strigose, longer than 



ovary 2. G. chiapensis. 



Ovary sparsely strigose near apex ; style glabrous, equaling ovary or 



shorter 11a. G. excelsa dubia. 



Leaflets 5 pairs or more ; petals 5, 10 mm. long ; ovary 5-celled, the cells 



2-ovulate 3. G. chichon. 



Ovary glabrous. 



Panicles about equaling the leaves or longer. 



Panicles, calyx, and petals glabrous 4. G. filiformis. 



Panicles, calyx, and petals more or less densely strigillose. 



Petals 6 mm. long; style about 2.5 mm. long, slender, distinctly longer 



than the ovary 5. G. tuerckheimi. 



Petals 3.8 to 4 mm. long ; style 1 mm. long or less, equaling or shorter 

 than the ovary. 

 Panicles nearly glabrous; leaflets of the larger leaves lance-elliptic, 

 acuminate to an obtuse apex, 4 times as long as wide or more. 



6. G. polyantha. 



Panicles rather densely strigillose; leaflets of the larger leaves oblong- 



obovate, obtusely short-pointed, less than 3 times as long as wide. 



7. G. heterophylla. 

 Panicles much shorter than the leaves. 



Petals glabrous; petioles 6 cm. long 8. G. brachystachya. 



Petals puberulous or ciliolate ; petioles 1.8 to 4.3 cm. long. 



Petals 8.5 mm. long 9. G. obtusata. 



Petals 3 to 4.7 mm. long. 



Petals merely ciliolate 10. G. makrinii. 



Petals strigillose or pilosulous outside. 



Gynophore glabrous 11. G. excelsa. 



Gynophore puberulous 12. G. virescens. 



