PiM — On the Hairs of the Androecium. 427 



Labiatje. 



Salvia is the only genus of the order in which. I have observed 

 androecial hairs. 



8. spkndeiis. — Scattered over filament, pluricellular, very deli- 

 cate, wall very thin, usually simple, rarely branched; tip very 

 obtuse. Diameter -0010. 



The closely allied 8. heeri has very similar hairs, but more 

 swollen at the nodes. 



8. fulgens. — Hairs large, deep red, wall strongly marked, 

 rarely branched, slightly verrucose, with minute warts. Diame- 

 ter -0015. 



8. rutiJam. — Almost simple, short, thick, wall delicate, uni- 

 cellular. Diameter -0015 (pi. xix., fig. 14). Pollen slightly 

 rugose, deeply sulcate. 



8. lencantha. — "While the whole plant, especially the calyx, is 

 unusually downy, the stamens are nearly glabrous, the hairs which 

 do occur differing considerably from those of the other species 

 I have examined. Those on filament — [a) are very short and 

 thick, either obtuse or capitate, consisting of two or three flattened 

 cells. When capitate the head is nearly globose ; (h) at base of 

 filament very short, simple, obtuse, scarcely more than papillae ; 

 unicellular. 



Primulaceje. 



Anagallis arvensis. — Stamens very woolly ; hairs pluricellular, 

 with delicate wall ; lower cells oblong ; upper two nearly spherical ; 

 all delicately striate, with longitudinal striae ; deep purple in 

 colour, whether petals happen to be red, blue, or white. Diameter 

 ■0008 (pi. XX., fig. 12). 



A. parksii {monelli) (pi. xx., / Very similar to A. arvensis, 

 fig. 13). I but with terminal segments 



A. phillipsu (pi. XX., fig. 14). ( more oblong. 



A. indica (pi. xx,, fig. 16) has terminal cell more spherical, 

 and showing traces, occasionally, of a vertical septum. 



A. var. Napoleon III. (pi. xx., fig. 15). Segments longer; 

 broader at ends than in the centre, thus somewhat resembling such 

 a bone as a human femur or humerus. In all these forms the cell* 

 wall is exceedingly thin, but appears often somewhat thick on 



