410 



ON SEEDLINGS 



Cotyledons oblong, obtuse, entire, fleshy, deep green, 8 mm. to 

 1/1 cm. long, 4-6 mm. broad. 



Stem succulent, soon becoming shrubby, pale green, very hairy, 

 ridged and furrowed ; 1st and 2nd, or even to the 4th internode, 

 undeveloped ; 5th 2 mm. long ; 6th undeveloped ; 7th 2 mm. long ; 

 8th 1 mm. ; 9th 4 mm. : 10th 2 mm. ; llth-13th 3-25 mm. ; 

 14th 2 mm. ; 15th 3'25 mm. ; 16th 3 mm. ; 17th 2*5 mm. ; 18th 

 and 19th each 2 mm. ; 20th 4 mm. ; 21st and 22nd each 2-25 mm. ; 

 23rd 1'75 ; 24th To mm. Different specimens vary in these lengths, 

 but specimens that bear a close resemblance 

 to one another fairly coincide in the lengths 

 of the internodes. 



Leaves simple or digitately trifoliolate (in 

 the seedling stage soon becoming simple), and 

 ultimately reduced to spines, alternate, or the 

 first four or six in opposite decussate pairs, 

 hairy, deep green, or subglaucous on the upper 

 surface ; leaflets or simple leaf incurved at 

 tbe margins and grooved or concave on the 

 upper face, with the lower ones petiolate, the 

 upper sessile ; petioles grooved above, convex 

 beneath. 



First Specimen. Leaves all simple, spathu- 

 late, with the first four in two opposite pairs. 

 Second Specimen. 1st pair linear-oblong, 

 obtuse, simple. 



2nd pair bifoliolate (one terminal and one 

 lateral leaflet). 

 No. 5. Spathulate, entire. 

 No. 6. Trifoliolate. 

 No. 7. Spathulate. 

 No. 8. Bifoliolate. 

 No. 9. Bifoliolate. 

 No. 10. Spathulate. 



Third Specimen. Nos. 1-6. Trifoliolate ; the first four in two 

 opposite pairs. 



Nos. 7-11. Spathulate. 



Fourth Specimen. Nos. 1 and 2. Trifoliolate, opposite. 



Nos. 3 and 4. Spathulate, opposite. 



No. 5. Bifoliolate, alternate. 



No. 6. Spathulate. 



Nos. 7 and 8. Bipartite. 



Nos. 9-18. Spathulate or lanceolate, linear. 



Nat. size. 



