Artist seal and meaning
it's 羅綺, in traditional chinese, in Small Seal Script (小篆)

the left character is 羅

http://humanum.arts.cuhk.edu.hk/Lexis/lexi-mf/search.php?word=羅

the right one is 綺

http://humanum.arts.cuhk.edu.hk/Lexis/lexi-mf/search.php?word=綺

1st, it's in vertical writing, you need to read from top to bottom, from right to left


羅庚香色　⒓⒐⒌⒈
綺申似凝　⒔⒑⒍⒉
寫春玉瓊　⒕⒒⒎⒊
　　京樹　　　⒏⒋


characters 1-8 are in traditional chinese, in 隸書:


香色
似凝
玉瓊
京樹


"色凝瓊樹﹒香似玉京" is derived from a 劉禹錫 (a poet of 唐 dynasty)'s poem 和令狐相公詠梔子花

蜀國花已盡﹒越桃今已開﹒色凝瓊樹倚﹒香似玉京來

且賞同心處﹒那憂別葉催﹒佳人如擬詠﹒何必待寒梅

characters 9-14 are in traditional chinese, in 行書:


羅庚
綺申
寫春


庚申 is one of sexagenary cycle, used to record time, day, month &amp; year; 春 is spring; together, it's either spring of 1920, or 1980.

last, "羅綺" is the name of author; "寫" is write.

have fun :)