There were 6 illustrations found for S. Howard
Peristrophe teklei EnsermuKew Bull., vol. 58 : p. 709, fig. 3 (2003) [S. Howard]
Lepidagathis pseudoaristata EnsermuKew Bull., vol. 64 : p. 59, fig. 1 (2009)
Acanthopale aethiogermanica EnsermuKew Bull., vol. 64 : p. 61, fig. 2 (2009)
Rhinacanthus mucronatus EnsermuKew Bull., vol. 64 : p. 63, fig. 3 (2009)
Barleria gidoleensis Ensermu & I.Darbysh.Kew Bull., vol. 73 : p. 4, fig. 1 (2018) [S. Howard]
Barleria negeleensis Ensermu & I.Darbysh.Kew Bull., vol. 73 : p. 18, fig. 6 (2018) [S. Howard]