I reviewed the ~dozen taxa present in Cochise COunty and bigelovii is the only one that appears to match this specimen, mostly due to the leaf structure. From Kearney & Peebles:
"FNA notes that B. bigelovii is distinguished by its short stature, obovate, coarsely and irregularly serrate leaves, erose-ciliate phyllaries and 5-nerved cypselae. Similar to B. thesioides, which differs having narrower, more oblong leaves with more evenly serrate margins and spinulose teeth."
http://swbiodiversity.org/seinet/taxa/index.php?taxon=Baccharis%20bigelovii
commonly known as: sita ashok, sorrowless tree • Ahom: ashok • Assamese: অশোক গছ ashoka gacha • Bengali: অশোক ashoka • Garo: bok-bang, khen-thiri • Gujarati: સીતાઅશોક sita-ashok • Haryanvi: सीता अशोक sita ashok • Hindi: सीता अशोक sita ashok • Kachari: asu-bhuphang, biardala, thaibor-phang • Kannada: ಆಚಂಗೆ aachange, ಅಶೋಕ ashoka, ಎಲಿಯಾಲ eliyaala, ಕೆಂಕಲಿ kenkali • Karbi: mir-krem-arong • Khasi: dieng-ja-mar-aih, dieng-soh-kyrkha, dieng-soh-rym-sein • Konkani: असोक asok • Kuki: maikam-par • Malayalam: അശോകം ashokam, ഹേമപുഷ്പം hemapushpam • Manipuri: ꯑꯁꯣꯛ ashoka • Marathi: अशोक ashok, जासुंदी jasundi, जसवंत jaswant, लाल अशोक laal ashok, सीतेचा अशोक sitecha ashok • Mizo: bai-kang, husangidba, maikam-par, mual-hawih • Nepali: अशोक ashok • Odia: ଅଙ୍ଗନାପ୍ରିଯ anganapriya, ଅଶୋକ asoka, ଦୋହଳୀ dohali, କଙ୍କେଳ kankela • Pali: असोक asoka • Punjabi: ਅਸ਼ੋਕ ashoka • Rajasthani: सीता अशोक sita ashok • Sanskrit: अपशोक apashoka, अशोक ashoka, चक्रगुच्छ chakraguccha, चित्र chitra, चित्रशोक chitrashoka, हेमपुष्प hemapuspa, कमन kamana, कामुक kamuka, कङ्केलि kangkeli, कान्ताचरणदोहद kantacharanadohada, कान्ताङ्घ्रिदोहद kantagghridohada, कर्णपूर karnapura, केलिक kelika, किङ्किरात kingkirata, मौलि mauli, नट nata, पिण्डपुष्य pindapushya, पिण्डीपुष्प pindipushpa, रागितरु ragitaru, रक्तपल्लव raktapallava, षट्पदानन्दवर्धन shatpadanandavardhana, सुभग subhaga, ताम्रपल्लव tamrapallava, विशोक vishoka, वीतशोक vitashoka • Tamil: அசோகம் ashokam • Telugu: అశోకము asokamu, కంగేలి kangeli, వంజులము vanjulamu • Tibetan: མྱ་ངན་མེད་པ mya ngan med pa, མྱ་ངན་འཚང mya ngan 'tshang • Tippera: bai-kang • Tulu: ಅಶೋಕ ಮರ ashoka mara • Urdu: اشوك ashok
Names compiled / updated at Names of Plants in India.
Ph40
Is there an Avocado tree in there too?
PH33
"Fytolaka (Phytolaka?) - dropped fruits, tree itself could be elsewhere"