bhArgava school                        \
chyavAna and ushaNa kAvya->Later bhR^igus|
("atharvaNa vidya")                      |
                                         |
 maitrAvaruNi school                     |--->bhArgavaH vaidarbhiH--->ghR^itakaushika--->charaka vasiShTha and agastya----->pippalAda     |  (canonical atharva veda)  (kaushika sUtra)                                          |
 kashyapa school                         |
nidhruva->asita                          |
                                         |
 angirasa school                         |
satyavAha bhAradvAja                    /
   |
   |------>punarvasu atreya->agniveshya bhAradvAja \
             |    (atreya school)                   |
             |                                      |-->sushruta kaushika
             |                                      |
             |----->dhanvantri kAshirAja            |
                  (kshatriya school)               /

hayaghosha--->shAlihotra
      (ashvashAstra)

sAmagAyana AmahIyava--->pala kApya
       (hastyAyurveda)]