Table 1. Morphological differences between Trigonella hasanakanii and T. caelesyriaca (data on the latter from the holotype and Boissier 1872: 80).

	T. hasanakanii	T. caelesyriaca	
Hairiness	loosely subadpressed--pubescent or glabrescent with age	sparingly hirtulous, glabrescent	
Stem length (cm)	15--40	10--26	
Leaflets			
   shape	obtuse	truncate	
   size (mm)	8--18 × 4--15	3--13 × 3--10	
Peduncle size (cm)	1.8--5, longer than petiole	15--38, equal to petiole or slightly longer	
Bracts	entire	lacerate	
Pedicel length (mm)	2.7--4	1--3	
Flowers per inflorescence	3--10	6--12	
Inflorescences	10--18 mm, umbellate or shortly racemose	10--30 mm, umbellate-capitate	
Calyx	2.5--3.5 mm, small and thin hairy	2.5--3.0 mm, subglabrous	
Corolla size (mm)	8--10	6--7	
Standard	equal to other parts	longer than other parts	
Wings	truncate	obtuse	
Pod size (mm)	30--50 × 1.5--3	25--40 × 1.3--2	
Pod surface	nerved nearly lengthwise, reticulate when indehiscent	nerved mainly lengthwise	
Seed-bearing part of legume (mm)	23--45	20--35	
Beak (mm)	2--9	5--10	
Seed number per pod	6--10	8--12	
Seed size (mm)	2--2.5 × 1--1.5	1.8--2.2 × 1--1.2